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 $151$ hours
each month with a standard deviation of $32$ hours. Assume that the underlying population distribution is normal.
Identify the following:
a. $x =_______$
b. $s_{x} =___$
c. $n =_$
d. $n - 1 =_____$

Expert verified

a. $x = 151$

b. $s_{x} = 32$

c. $n = 108$

d. $n - 1 = 107$

Step by step solution

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 $151$ hours each month with a standard deviation of $32$ hours.

Assume that the underlying population distribution is normal.

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

According to the given information, the standard deviation is $s_{x} = 32$

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

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

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