Statistics | Mathematics homework help


Assume that you intent to use a wisdom flatten of α = 0.05 to touchstone the privilege that p1 = p2. Use the absorbed scantling bignesss and total of successes to discover the pooled consider p. Round your rejoinder to the undeviating thousandth.

n1 = 100               n2 = 100               x1 = 42                  x2 = 45

Select one:

a. 0.435

b. 0.392

c. 0.305

d. 0.479                              

Question 2

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Construct the implied self-reliance period for the dissent among population proportions p1 - p2. Suppose that the scantlings are fractions and that they own been strayly separated.  In a stray scantling of 300 women, 45% favored stricter gun regulate synod. In a stray scantling of 200 men, 25% favored stricter gun regulate synod. Construct a 98% self-reliance period for the dissent among the population proportions p1 - p2.

Select one:

a. 0.102 < p1 - p2 < 0.298

b. 0.114 < p1 - p2 < 0.286

c. 0.118 < p1 - p2 < 0.282

d. 0.092 < p1 - p2 < 0.308

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Construct the implied self-reliance period for the dissent among the two population resources. Suppose that the two scantlings are fractions unblended stray scantlings separated from normally arranged populations. Do not suppose that the population measure deviations are correspondent.   Fractions scantlings from two unanalogous populations consent the aftercited axioms.

x1 = 958, x2 = 157, s1 = 77, s2 = 88.

The scantling bigness is 478 for twain scantlings. Discover the 85% self-reliance period for μ1 - μ2.

Select one:

a. 794 < μ1 - μ2 < 808

b. 800 < μ1 - μ2 < 802

c. 793.2946 < μ1 - μ2 < 808.7054

d. 781 < μ1 - μ2 < 821

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Assume that you intent to use a wisdom flatten of α = 0.05 to touchstone the privilege that p1 = p2. Use the absorbed scantling bignesss and total of successes to discover the P-rate for the conjecture touchstone.

n1 = 50                  n2 = 50                  x1 = 8                    x2 = 7

Select one:

a. 0.3897

b. 0.7794

c. 0.6103

d. 0.2206

Question 5

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A depict manufacturer made a revision to a depict to accelerate up its arefaction gap. Fractions unblended stray scantlings of 11 cans of form A (the first depict) and 9 cans of form B (the mitigated depict) were separated and applied to correspondent surfaces. The arefaction gaps, in hours, were narrative.

The resume statistics are as follows.

Type A                                   Form B

x1 = 76.3 hrs                       x2 = 65.1 hrs

s1 = 4.5 hrs                          s2 = 5.1 hrs

n1 = 11                                  n2 = 9

The aftercited 98% self-reliance period was obtained for μ1 - μ2, the dissent among the medium arefaction gap for depict cans of form A and the medium arefaction gap for depict cans of form B:

4.90 hrs < μ1 - μ2 < 17.50 hrs

What does the self-reliance period hint environing the population resources?

Select one:

a. The self-reliance period includes 0 which hints that the two population resources capacity be correspondent. There doesn't show to be a speaking dissent among the medium arefaction gap for depict form A and the medium arefaction gap for depict form B. The revision does not look to be serviceable in reducing arefaction gaps.

b. The self-reliance period includes singly unequivocal rates, which hints that the medium arefaction gap for depict form A is smaller than the medium arefaction gap for depict form B. The revision does not look to be serviceable in reducing arefaction gaps.

c. The self-reliance period includes singly unequivocal rates which hints that the medium arefaction gap for depict form A is senior than the medium arefaction gap for depict form B. The revision looks to be serviceable in reducing arefaction gaps.

d. The self-reliance period includes singly unequivocal rates, which hints that the two population resources capacity be correspondent. There doesn't show to be a speaking dissent among the medium arefaction gap for depict form A and the medium arefaction gap for depict form B. The revision does not look to be serviceable in reducing arefaction gaps.

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When performing a conjecture touchstone for the relative of two population variances, the higher fastidious F rate is denoted FR. The inferior fastidious F rate, FL, can be set-up as follows: intercourse the degrees of immunity, and then procure the alternate of the effecting F rate set-up in board A -5. FR can be denoted Fα/2 and FL can be denoted F1-α/2 .

Find the fastidious rates FL and FR for a two-tailed conjecture touchstone fixed on the aftercited rates:

n1 = 25, n2 = 16, α = 0.10

Select one:

a. 0.7351, 2.2378

b. 0.4745, 2.2878

c. 0.5327, 2.2878

d. 0.4745, 2.4371

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Consider the set of dissents among two hanging sets: 84, 85, 83, 63, 61, 100, 98. Round to the undeviating tenth.

Select one:

a. 15.7

b. 15.3

c. 16.2

d. 13.1

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Determine the judgment experience for rejecting the ineffectual conjecture in the absorbed conjecture touchstone; i.e., recount the rates of the touchstone statistic that would effect in exclusion of the ineffectual conjecture. 

We longing to collate the resources of two populations using paired observations. Suppose that d-bar = 3.125, Sd = 2.911, and n = 8, and that you longing to touchstone the aftercited conjecture at the 10% flatten of wisdom:

               H0: μd = 0 athwart H1: μd > 0.

What judgment administration would you use?

Select one:

a. Reject H0 if touchstone statistic is senior than -1.415 and hither than 1.415.

b. Reject H0 if touchstone statistic is hither than 1.415.

c. Reject H0 if touchstone statistic is senior than 1.415.

d. Reject H0 if touchstone statistic is senior than -1.415.

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The two axioms sets are hanging. Discover d-bar to the undeviating tenth.

A     69     66     61     63     51

B     25     23     20     25     22

Select one:

a. 50.7

b. 39.0

c. 23.4

d. 48.8

Question 10

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Assume that you deficiency to touchstone the privilege that the paired scantling axioms conclude from a population for which the medium dissent is μd = 0. Compute the rate of the t touchstone statistic. Round interjacent calculations to indecent decimal places as needed and ultimate rejoinders to three decimal places as needed.

x   28     31     20     25    28    27    33    35

y   26     27     26     25    29    32    33    34

Select one:

a. t = -0.185

b. t = -0.523

c. t = -1.480

 

d. t = 0.690