Qmb harvard final exam final assessment test i (complete answers key)


1.

The median is frequently a amend symbolical of the mediate appraise of a postulates set when the postulates set:

Source

Top of Form

·       

Is bimodal.

·       

Has a haughty kind flexion.

·       

Is haughtyly skewed.

·       

Has no outliers.

2.

The postulates in the Excel spreadsheet linked adown arrange advice on the feedingal satisfied (in grams per serving) of some ascititious breakfast cereals.

For which nutrients is the medium nutrient satisfied per serving important than the median nutrient satisfied per serving?

Breakfast Cereals
Source

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Proteins solely.

Complex carbohydrates solely.

Both nutrients.

Neither nutrient.

3.

The histogram adown conspires the carbon monoxide (CO) emissions (in triturates/minute) of 40 contrariant airplane fashions at charm-off.

The dispensation is best illustrative as is:

Source

 

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Uniform.

Heteroskedastic.

Normal.

Skewed exact.

4.

The histogram adown conspires the carbon monoxide (CO) emissions (in triturates/minute) of 40 contrariant airplane fashions at charm-off.

Which of the forthcoming averments is the best misentry that can be inducen from this histogram?

Source

 

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The medium aggregate of carbon monoxide emissions is important than the median aggregate of carbon monoxide emissions.

The medium aggregate of carbon monoxide emissions is short than the median aggregate of carbon monoxide emissions.

The medium and median aggregates of carbon monoxide emissions are environing correspondent.

The referring-to bulks of the medium and median aggregates of carbon monoxide emissions cannot be deduced from the histogram.

In the postulates set pompn adown, the mutuality coefficient of the two inconstants is:

Correlation Data
Source

        

 

 

6.

The postulates in the Excel spreadsheet linked adown bestow the ages and salaries of the foremost adherent officers of 59 companies delay sales floating $5 regardite and $350 regardite.

The mutuality floating age and allowance can be characterized as:

CEO Salaries
Source

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·       

Strong and indisputable.

·       

Strong and privative.

·       

Weak and indisputable.

·       

Weak and privative

Bottom of Form

 

 

Top of Form

-1.0.

-0.5

0.0

None of the aloft

 

43.

Electronics creator SE must run whether or not to endue in the fruit of a new kind of battery. If the fruit surpasss, the traffic for the battery may be great or inferior. If it doesn't surpass, the fruit efforts may or may not beget inferior innovations that would offset some of the battery's fruit costs. The tree adown summarizes the solidness.

The EMV of discloseing the new battery is $300,000. Grounded on EMV, SE should disclose the battery. Loving that fruit is happy, for what endsharp-end appraises for a great traffic does discloseing the battery entertain a inferior EMV than not discloseing the battery?

Source

 

 

Top of Form

Less than $1.2 regardite.

Greater than $1.2 regardite.

Greater than $0.75 regardite.

None of the aloft.

44.

The overseer of the Eris Shoe Company must run whether or not to narrow a controversial sports reputation as its spokesperson. The new spokesperson's appraise to Eris depends heavily on consumers' understanding of him. An tempetrounce solidness segregation grounded on succorful postulates reveals that the wait-fored monetary appraise of narrowing the new spokesindividual is $260,000. For $50,000 Eris can pledge a traffic exploration solid that accomplish succor Eris gather further environing how consumers energy rebound to the reputation. The EMV of buying this pattern advice (magnificent it is generous) for this solidness is $300,000.

The tree adown summarizes Eris's solidness. Grounded on EMV segregation, Eris's overseer should:

Hire the exploration solid.

Not engage the exploration solid, but narrow the new spokesperson.

Not engage the exploration solid and not narrow the new spokesperson.

The solution cannot be fast from the advice

 

7.

7. For a bestown set of postulates, the kind flexion measures:

Source

The distinction floating the medium and the postulates sharp-end remote from the medium.

The distinction floating the medium and the postulates sharp-end unswerving to the medium.

The distinction floating the medium and the median.

None of the aloft

 

5.

In the postulates set pompn adown, the mutuality coefficient of the two inconstants is:

Correlation Data
Source

 

-1.0.

-0.5

0.0

None of the aloft

8.

The postulates in the Excel spreadsheet linked adown bestow the medium refashion trounces of indecent currencies to the US dollar during October 2002.

Over this limit, which sociality was most evaporating referring-to to the US dollar, as measured by the coefficient of qualify?

Exqualify Rates
Source

The Brazilian Real.

The Euro.

The Japanese Yen.

The South Korean Won

9.

A averal affair store intends to scan its subscribers to mention who they hold is the "CEO of the Century." Subscribers are invited to finished an onmethod scan.

Based solely on this advice, which of the forthcoming can be deduced environing the scan results?

Source

They accomplish be particular consequently the store's subscribers are absolute to mention who the CEO of the generation is.

They accomplish correspondently meditate the idea of the aver as a all environing who the CEO of the generation is.

They accomplish be unjaundiced consequently the respondents accomplish be self-selected.

They accomplish be particular consequently subscribers who entertain proceeding to the onmethod scan are not symbolical of the population of subscribers as a all.

10.

A political consultant commences a scan to mention what situation the mayoral applicant she works for should charm on a contemplated smoking ban in restaurants.

Which of the forthcoming scan questions accomplish concede an unjaundiced rejoinder?

Source

Should the city ban smoking in restaurants to defend our misentry from remedy-hand fume?

Should tobacco fume, a disclosed reason of lung cancer, be banned from social spaces such as restaurants?

Does the city entertain the exact to incarcetrounce recreational activities, such as tempetrounce waste of alcohol or tobacco, on the antecedent of privately-owned affaires?

None of the aloft

11.

In a of-late administered IQ ordeal, the scores were nice normally, delay medium 100 and kind flexion 15.

What correlation of the ordeal charmrs scored floating 70 and 130?

Source

About 68%.

About 84%.

About 95%.

About 99.5%.

12.

Which of the forthcoming is not gentleman environing the Normal Distribution?

Source

It is symmetric.

Its medium and median are correspondent.

It is finishedly illustrative by its medium and its kind flexion.

It is bimodal.

 

13.

The histogram adown pomps the underlying dispensation precedent of the results of a rolled die. Suppose the die is rolled 50 times and the results are mediumd. Suppose this arrangement — rolling 50 dice and averaging their results — is numerous 100 times.

Which of the forthcoming best describes the dispensation of these 100 mediums?

Source

 

Skewed exact.

Skewed left.

Normal.

Uniform.

14.

A feeding explorationer wants to mention the medium fat satisfied of hen's eggs. She collects a pattern of 40 eggs. She calculates a medium fat satisfied of 23 grams, delay a pattern kind flexion of 8 grams. From these statistics she calculates a 90% belief intermission of [20.9 grams, 25.1 grams].

What can the explorationer do to curtail the width of the belief intermission?

Source

Increase the belief smooth.

Decrease the belief smooth.

Decrease the pattern bulk

None of the aloft.

15.

In a chance pattern of 321 main citizens, 61 were endow to own a abode computer.

Based on this pattern, the 95% belief intermission for the correlation of computer-owners floating main citizens is:

Source

[2.6%; 7.4%].

[13.4%; 24.6%].

[14.7%; 23.3%].

The solution cannot be fast from the advice bestown

 

16.

Preliminary estimates recommend that environing 58% of students at a aver university regard implementing an spirit legislation.

To get a 95% belief intermission for the correlation of all students at the university regarding the spirit legislation, what is the stint pattern bulk needed if the totalwidth of the belief intermission must be short than 5 percentage sharp-ends (i.e., the belief intermission should expand at most 2.5 percentage sharp-ends aloft and adown the pattern correlation)?

Source

375.

264.

1,498.

The solution cannot be fast from the advice bestown.

17.

In a scan of twelve Harbor Affair School graduates, the medium starting allowance was $93,000, delay a kind flexion of $17,000.

The 95% belief intermission for the medium starting allowance floating all Harbor graduates is:

Source

[$83,382; $102,618].

[$82,727; $103,327].

[$82,199; $103,801].

[$59,000; $127,000].

18.

In a scan of 53 chancely separated patrons of a shopping mall, the medium aggregate of sociality carried is $42, delay a kind flexion of $78.

What is the 95% belief intermission for the medium aggregate of sociality carried by mall patrons?

Source

[$39.1; $44.9].

[$24.4; $59.6].

[$21.0; $63.0].

[$14.4; $69.6].

19.

A supply muniment in a brewery is intentional to scourteous bottles delay 355 ml of callous cider. In experience, notwithstanding, quantitys deviate subordinately from bottle to bottle. In a pattern of 49 bottles, the medium quantity of cider is endow to be 354 ml, delay a kind flexion of 3.5 ml.

At a reason smooth of 0.01, which misentry can the brewer induce?

Source

The gentleman medium quantity of all bottles swelled is 354 ml.

The muniment is not supply bottles to an medium quantity of 355 ml.

Tclose is not plenty declaration to point-out that the muniment is not supply bottles to an medium quantity of 355 ml.

The muniment is supply bottles to an medium quantity of 355 ml.

20.

To commence a one-sided fancy ordeal of the pretension that issues located on nook lots (corner-lot issues) entertain haughtyer medium selling damagess than those located on non-nook lots, the forthcoming resource fancy should be used:

House Prices Data
Source

The medium selling damages of a nook-lot issue is haughtyer than it is commsolely believed to be.

The medium selling damages of a nook-lot issue is haughtyer than the medium selling damages of all issues.

The medium selling damages of a nook-lot issue is the similar as the medium selling damages of a issue not located on a nook lot.

The medium selling damages of a nook-lot issue is haughtyer than the medium selling damages of a issue not located on a nook lot.

21.

The postulates in the Excel spreadsheet linked adown point-out the selling damagess of issues located on nook lots ("corner-lot issues") and of issues not located on nook lots.

Conduct a one-sided fancy ordeal of the pretension that nook-lot issues entertain haughtyer medium selling damagess than those located on non-nook lots. Using a 99% belief smooth, which of the forthcoming averments do the postulates aid?

House Prices Data
Source

Upscale, costly neighborhoods entertain further street nooks.

The medium selling damages of a nook-lot issue is haughtyer than that of the medium issue not located on a nook lot.

The medium selling damages of a nook-lot issue is no further than that of the medium issue not located on a nook lot.

Tclose is not plenty declaration to aid the pretension that the medium selling damages of a nook-lot issue is haughtyer than that of the medium issue not located on a nook lot.

22.

Two semiconductor truthories are entity compared to see if tclose is a distinction in the medium shortcoming trounces of the chips they yield. In the leading truthory, 250 chips are patternd. In the remedy truthory, 350 chips are patternd. The correlations of shortcominpresent chips are 4.0% and 6.0%, appertainingly.

Using a belief smooth of 95%, which of the forthcoming averments is aided by the postulates?

Source

Tclose is not adapted declaration to pomp a speaking distinction in the medium shortcoming trounces of the two truthories.

Tclose is a speaking distinction in the medium shortcoming trounces of the two truthories.

The leading truthory's medium shortcoming trounce is inferior than the remedy truthory's on 95 out of 100 days of action.

None of the aloft.

23.

The return segregation adown relates medium annual per capita beef waste (in triturates) and the refractory incontinuous "medium annual beef damages" (in dollars per triturate).

The coefficient on beef damages tells us that:

Beef Waste and Price
Source

 

For integral damages growth of $1, medium beef waste curtails by 9.31 triturates.

For integral damages growth of $1, medium beef waste growths by 9.31 triturates.

For integral damages growth $9.31, medium beef waste curtails by 1 triturate.

For damages growth of $9.31, medium beef waste growths by 1 triturate

24.

The return segregation adown relates medium annual per capita beef waste (in triturates) and the refractory incontinuous "medium annual beef damages" (in dollars per triturate).

In a year in which the medium damages of beef is at $3.51 per triturate, we can wait-for medium annual per capita beef waste to be approximately:

Beef Waste and Price
Source

 

55.2 triturates

52.6 triturates

53.6 triturates

117.9 triturates

25.

The return segregation adown relates medium annual per capita beef waste (in triturates) and the refractory incontinuous "medium annual per capita pork waste" (in triturates).

At what smooth is the coefficient of the refractory incontinuous pork waste speaking?

Beef Waste and Pork Consumption
Source

 

0.10.

0.05.

0.01.

None of the aloft

26.

The return segregation adown relates medium annual per capita beef waste (in triturates) and the refractory incontinuous "medium annual per capita pork waste" (in triturates).

Which of the forthcoming averments is gentleman?

Beef Waste and Pork Consumption
Source

 

Beef waste can never be short than 65.09 triturates.

Beef waste can never be important than 65.09 triturates.

The y-intercept of the return method is 65.09 triturates.

The x-intercept of the return method is 65.09 triturates.

27.

The return segregation at the depth relates medium annual per capita beef waste (in triturates) and the refractory inconstants "medium annual per capita pork waste" (in triturates) and "medium annual beef damages" (in dollars per triturate).

Which of the refractory inconstants is speaking at the 0.01 smooth?

Beef Consumption, Pork Consumption, and Beef Price
Source

 

Beef damages solely.

Pork waste solely.

Both refractory inconstants.

Neither refractory inconstant.

28.

The return segregation at the depth relates medium annual per capita beef waste (in triturates) and the refractory inconstants "annual per capita pork waste" (in triturates) and "medium annual beef damages" (in dollars per triturate).

The coefficient for beef damages, -12, tells us that:

Beef Consumption, Pork Consumption, and Beef Price
Source

 

For integral $1 growth in beef damages, medium beef waste curtails by 12 lbs, not forceful for pork waste.

For integral $12 ooze in beef damages, medium beef waste curtails by 1 lbs, not forceful for pork waste.

For integral $1 growth in beef damages, medium beef waste curtails by 12 lbs, forceful for pork waste, i.e. business pork waste continuous.

For integral $12 curtail in beef damages, medium beef waste curtails by 1 lbs, forceful for pork waste, i.e. business pork waste continuous.

29.

The postulates in the Excel spreadsheet linked adown bestow the seasonally adjusted appraise of aggregate new car sales (in regardites of dollars) in the United States, aggregate averal wage and allowance disbursements (referred to close as "compensation") (in billions of dollars), and the holding smooth in the non-agricultural sector (in thousands) for 44 arranged quarters. An auto activity adherent wants to apprehend how courteous she can foretell new car sales two quarters in proceeding using the present quarter's damages postulates.

How divers postulates sharp-ends can she use in a return segregation using the postulates arranged?

Car Sales Data
Source

41.

42.

43.

44.

30.

The Excel spreadsheet linked adown contains the undesigning returns of aggregate new car sales (in regardites of dollars) on each of two refractory inconstants: "compensation" (in billions of dollars) and "holding smooth in the non-agricultural sector" (in thousands) .

Which of the forthcoming refractory inconstants explains further than 90 percent of the observed qualify in new car sales?

Car Sales Undesigning Regressions
Source

 

Compensation solely.

Employment smooth solely.

Both refractory inconstants

31.

The return segregation adown relates the appraise of new car sales (in regardites of dollars) to damages (in billions of dollars) and the holding smooth in the non-agricultural sector (in thousands) for 44 arranged quarters.

Which of the two refractory inconstants is statistically speaking at the 0.05 smooth?

Car Sales Multiple Regression
Source

 

Compensation solely.

Employment smooth solely.

Both refractory inconstants.

Neither refractory inconstant.

32.

The return segregation adown relates the appraise of new car sales (in regardites of dollars) and the refractory inconstants "compensation" (in billions of dollars) and "holding smooth in the non-agricultural sector" (in thousands) for 44 arranged quarters. Compare this multiple return to the undesigning returns delay damages and holding smooth as the appertaining refractory inconstants.

Which of the forthcoming is the slight delinquent of the gesticulatory growth in the p-appraise for holding smooth in the multiple return?

Car Sales Regressions
Source

 

Multicollinearity.

Heteroskedasticity.

Nonlinearity.

None of the aloft

33.

The return segregation adown relates the appraise of new car sales (in regardites of dollars) and the refractory inconstants "compensation" (in billions of dollars) and "holding smooth in the non-agricultural sector" (in thousands) for 44 arranged quarters.

The coefficient for holding smooth, 0.21, describes:

Car Sales Multiple Regression
Source

 

The conduct of car sales as the holdings smooth qualifys, forceful for damages.

The conduct of the holding smooth as car sales qualify, not forceful for damages.

The conduct of car sales as the holding smooth qualifys, not forceful for damages.

The conduct of the holding smooth as car sales qualify, forceful for damages.

34.

A new rank hurry matter is entity ordealed. The return segregation adown describes the homogeneity floating the 41 ordeal matters' diastolic rank hurry and the dummy incontinuous "medication." When a ordeal matter is prelude the new refuse, the appraise of medication is 1, when not, the appraise of medication is 0.

Which of the forthcoming can be deduced from the return segregation?

Blood Pressure
Source

 

The medication has no statistically speaking property (at a 0.01 reason smooth).

The use of medication representations for encircling 42% of the qualify in diastolic rank hurry.

On medium, ordeal matters prelude the medication ment a diastolic rank hurry smooth environing 5 sharp-ends inferior than those not prelude the medication.

None of the aloft.

35.

In a return segregation, a residual conspire is:

Source

A plant diagram that conspires the appraises of the residuals despite the appraises of the resting inconstant.

A plant diagram that conspires the appraises of the residuals despite the appraises of an refractory inconstant.

A histogram that conspires the quantity of fixed appraise ranges of the residuals.

None of the aloft.

36.

In a return segregation, if a new refractory incontinuous is pretended and R-squared growths and adjusted R-squared curtails precipitously, what can be concluded?

Source

The new refractory incontinuous amends the foretellive force of the return fashion.

The new refractory incontinuous does not amend the foretellive force of the return fashion.

The return was manufactured improperly. It is impracticable for R-squared to growth and adjusted R-squared curtail concertedly.

The new refractory inconstant's coefficient is not speaking at the 0.01 smooth

37.

The consideration adown displays postulates the Leading Bank of Silverhaven (FBS) has serene on the singular savings representations of its job-business customers. The consideration includes postulates on the dispensation of the calculate of representations held by Homeowners vs. Non-Homeowners, and by whether the customer is Self-Employed or is Industrious by a solid in which he or she does not entertain an holding venture.

What is the chance that a bestown representation-holder is self-employed?

Source

 

15%

12%

3%

None of the aloft.

38.

The consideration adown displays postulates the Leading Bank of Silverhaven (FBS) has serene on the singular savings representations of its job-business customers. The consideration includes postulates on the dispensation of the calculate of representations held by Homeowners vs. Non-Homeowners, and by whether the customer is Self-Employed or is Industrious by a solid in which he or she does not entertain an holding venture.

What is the liable chance that an representation-holder is industrious by a solid in which he or she does not entertain an holding venture, bestown that the representation-holder is a abodeowner?

Source

 

82.9%

68.2%

59.5%

None of the aloft.

39.

The consideration adown displays postulates the Leading Bank of Silverhaven (FBS) has serene on the singular savings representations of its job-business customers. The consideration includes postulates on the dispensation of the calculate of representations held by Homeowners vs. Non-Homeowners, and by whether the customer is Self-Employed or is Industrious by a solid in which he or she does not entertain an holding venture.

Which of the forthcoming averments is gentleman?

Source

 

Home holding and holding standing are statistically resting.

The truth that a bestown singular representation is held by a abodeowner tells us trifle environing the representation holder's holding standing.

The truth that a bestown singular representation is held by a self-industrious individual tells us trifle environing the representation-holder's abode holding standing.

None of the aloft.

40.

Electronics creator SE must run whether or not to endue in the fruit of a new kind of battery. If the fruit surpasss, the traffic for the battery may be great or inferior. If it doesn't surpass, the fruit efforts may or may not beget inferior innovations that would offset some of the battery's fruit costs. The tree adown summarizes the solidness.

What is the wait-fored monetary appraise of discloseing the new battery?

Source

 

$0.3 regardite

-$0.5 regardite

$0.9 regardite

$1.5 regardite

41.

Electronics creator SE must run whether or not to endue in the fruit of a new kind of battery. If the fruit surpasss, the traffic for the battery may be great or inferior. If it doesn't surpass, the fruit efforts may or may not beget inferior innovations that would offset some of the battery's fruit costs. The tree adown summarizes the solidness.

The EMV of discloseing the new battery is $300,000. Grounded on EMV, SE should disclose the battery. If the overseer chooses not to disclose the battery, which of the forthcoming best describes the overseer's pose towards this solidness?

Source

 

Risk indisposed.

Risk uninterfering.

Risk seeking.

Cowardly.

42.

Electronics creator SE must run whether or not to