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# Solution: Assume that all variable are approximately ISBN: 9780073534985 75

## Solution for problem 7E Chapter 7.2

Elementary Statistics: A Step By Step Approach | 9th Edition

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Problem 7E

Assume that all variable are approximately normally distributed.

Women Representatives in State Legislature

A state representative wishes to estimate the mean number of women representatives per state legislature. A random sample of 17 states is selected, and the number of women representatives is shown. Based on the sample, what is the point estimate of the mean? Find the 90% confidence interval of the mean population. (Note: The population mean is actually 31.72, or about 32.) Compare this value to the point estimate and the confidence interval. There is something unusual about the data. Describe it and state how it would affect the confidence interval.

 5 33 35 37 24 31 16 45 19 13 18 29 15 39 18 58 132
Step-by-Step Solution:
Step 1 of 3

Solution 7E

Step1 of 4:

From the given problem we have a data set and it is given below:

 5 33 35 37 24 31 16 45 19 13 18 29 15 39 18 58 132

Here our goal is:

a). We need to find the point estimate of the mean.

b). We need to find the 90% confidence interval of the mean population.

c). We need to check is there any unusual about the data.

Step2 of 4:

a).

1). The mean price of the particular model is obtained from excel by using the function:

“=Average(Select all data)” 2). The standard deviation of the particular model is obtained from excel by using the function:

“=Std(Select all data)” 3). We have,   Now,  Therefore, The degrees of freedom is calculated by using the formula:  Therefore,...

Step 2 of 3

Step 3 of 3

##### ISBN: 9780073534985

The answer to “Assume that all variable are approximately normally distributed.Women Representatives in State LegislatureA state representative wishes to estimate the mean number of women representatives per state legislature. A random sample of 17 states is selected, and the number of women representatives is shown. Based on the sample, what is the point estimate of the mean? Find the 90% confidence interval of the mean population. (Note: The population mean is actually 31.72, or about 32.) Compare this value to the point estimate and the confidence interval. There is something unusual about the data. Describe it and state how it would affect the confidence interval.5333537243116451913182915391858132” is broken down into a number of easy to follow steps, and 102 words. Elementary Statistics: A Step By Step Approach was written by and is associated to the ISBN: 9780073534985. The full step-by-step solution to problem: 7E from chapter: 7.2 was answered by , our top Statistics solution expert on 09/01/17, 05:46AM. This full solution covers the following key subjects: representatives, mean, Women, interval, state. This expansive textbook survival guide covers 33 chapters, and 1015 solutions. This textbook survival guide was created for the textbook: Elementary Statistics: A Step By Step Approach , edition: 9. Since the solution to 7E from 7.2 chapter was answered, more than 242 students have viewed the full step-by-step answer.

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