Normal distributon problems – assume that the mean hourly cost to



1. Assume that the balance hourly absorb to produce a retail airplane prospers the usual dispensation after a while a balance of $2,075 per hour and a flag derangement of $225.

What is the loose absorb for the averageest 6 percent of the airplanes? (Round z treasure to 2 decimal situates. Omit the "$" badge in your counterpart.)

Operating Costs $

2.The absorb per part at a supermarket prospers an exponential dispensation. There are sundry worthless parts and a few proportionately dear ones. The balance absorb per part is $6.00. What is the percentage of parts that absorb:

rev: 10_13_2011
(a) Less than $3.00? (Round your counterpart to 4 decimal situates.)

Probability

 

3. A regular dispensation is defined balance the interim from 6 to 10.

(a) What are the treasures for a and b?

a

b

________________________________________

(b) What is the balance of this regular dispensation?

Mean


(c) What is the flag derangement? (Round your counterpart to 2 decimal situates.)

Standard derangement


(d) The entirety area is 1.00.


(e) Find the chance of a treasure past than 7. (Round your counterpart to 2 decimal situates.)

Probability


(f) Find the chance of a treasure betwixt 7 and 9. (Round your counterpart to 1 decimal situate.)

Probability


4. The balance of a usual chance dispensation is 60; the flag derangement is 5. (Round your counterparts to 2 decimal situates. Omit the % badge in your counterpart.)

(a) About what percent of the observations lie betwixt 55 and 65?

Percentage of observations %


(b) About what percent of the observations lie betwixt 50 and 70?

Percentage of observations %


(c) About what percent of the observations lie betwixt 45 and 75?

Percentage of observations %


7. The divulsion for a one-bedroom chamber in Southern California prospers the usual dispensation after a while a balance of $2,300 per month and a flag derangement of $220 per month. The dispensation of the monthly absorbs does not prosper the usual dispensation. In occurrence, it is positively skewed.

What is the chance of selecting a pattern of 70 one-bedroom chambers and opinion the balance to be at last $2,250 per month? (Round z treasure to 2 decimal situates and definite counterpart to 4 decimal situates.)

9 Scrapper Elevator Company has 20 sales figuratives who retail their issue throughout the United States and Canada. The reckon of units sold by each figurative is listed under. Assume these sales figures to be the population treasures.

2 3 2 3 3 4 2 4 3 2 2 7 3 4 5 3 3 3 3 5

Compute the Balance of the population (entire to 1 decimal situate)

10 What is the badge for flag hallucination of the balance?