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Chapter 8: Q.46 (page 479)

Which distribution should you use for this problem?

Short Answer

Expert verified

The distribution required for this problem is t distribution with parameterstn-1

Step by step solution

01

Given information

Given in the question that, One hundred eight Americans were surveyed to determine the number of hours they spend watching television each month.

We have to find which distribution should you use for this problem?

02

Explanation

They watched an average of 151hours per month on average, with a standard variation of 32hours. Assume that the population distribution is normally distributed. Because there are 108Americans in the poll.

So, the distribution is t108-1=t107

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Most popular questions from this chapter

In complete sentences, explain why the confidence interval in Exercise 8.17 is larger than in Exercise 8.18.

A random sample of statistics students were asked to estimate the total number of hours they spend watching television in an average week. The responses are recorded in Table 8.4. Use this sample data to construct a 98% confidence interval for the mean number of hours statistics students will spend watching television in one week.

0
3
1
20
9
5
10
1
10
4
14
2
4
4
5

Table8.4

Fill in the blanks on the graph with the areas, upper and lower limits of the confidence interval, and the sample mean.

The data in the Table are the result of a random survey of 39national flags (with replacement between picks) from various countries. We are interested in finding a confidence interval for the true mean number of colors on a national flag. Let X=the number of colors on a national flag.

XFreq.11273184756

As a result of your answer to Exercise8.52, state the exact distribution to use when calculating the confidence interval.

The data in the Table are the result of a random survey of 39national flags (with replacement between picks) from various countries. We are interested in finding a confidence interval for the true mean number of colors on a national flag. Let X=the number of colors on a national flag.

XFreq.11273184756

Construct a 95%confidence interval for the true mean number of colors on national flags.

Calculate the following:

a. lower limit

b. upper limit

c. error bound
See all solutions

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