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Chapter 8: Q.44 (page 479)

Define the random variable X in words.

Short Answer

Expert verified

The random variable Xindicates the amount of time Americans spend watching television every month.

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.

02

Explanation

It was revealed that they watched an average of 151 hours each month with a standard deviation of 32 hours. Assume that the underlying population distribution is normal.

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Most popular questions from this chapter

Suppose the Census needed to be 98% confident of the population mean length of time. Would the Census have to survey more people? Why or why not?

Identify the following specifications:

a. lower limit

b. upper limit

c. error bound

Identify the following:

a. x=_______

b. sx =_______

c. n =_______

d. n 鈥� 1 =_______

In complete sentences, give an interpretation of what the interval in Exercise 8.18 means.

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
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