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Chapter 8: Q. 43 (page 479)

Use the following information to answer the next six exercises: One hundred eight Americans were surveyed to determine the number of hours they spend watching television each month. It was revealed that they watched an average of 151hours

each month with a standard deviation of 32hours. Assume that the underlying population distribution is normal.

Identify the following:

a.x=_______

b.sx=_______

c.n=_______

d.n鈥�1=_______

Short Answer

Expert verified

a. x=151

b. sx=32

c. n=108

d.n-1=107

Step by step solution

01

Given information

One hundred eight Americans were surveyed to determine the number of hours they spend watching television each month.

It was revealed that they watched an average of 151hours each month with a standard deviation of 32hours.

Assume that the underlying population distribution is normal.

02

Explanation (part a)

According to the given information, the total number of hours that Americans spend watching television each month is given by,X=151

03

Explanation (part b)

According to the given information, the standard deviation issx=32

04

Explanation (part c)

According to the given information, total number of Americans surveyed is given by,n=108

05

Explanation (part d)

According to the given information, the sample space is given by,n-1=108-1=107

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