A past study claimed that adults in America spent an average of 18 hours a week on leisure activities. A researcher wanted to test this claim. She took a sample of 10 adults and asked them about the time they spend per week on leisure activities. Their responses (in hours) are as follows. 14.0 16.2 21.8 22.2 24.7 32.6 19 20.5 20.9 20.3 Assume that the times spent on leisure activities by all adults are normally distributed. Using the 5% significance level, can you conclude that the average amount of time spent by American adults on leisure activities has changed? (Hint: First calculate the sample mean and the sample standard deviation for these data. Then make the test of hypothesis about u.) Round the sample standard deviation to three decimal places.

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Chapter 09, Section 9.3, Problem 047
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A past study claimed that adults in America spent an average of 18 hours a week on leisure activities. A researcher wanted to test
this claim. She took a sample of 10 adults and asked them about the time they spend per week on leisure activities. Their responses
(in hours) are as follows.
14.0 16.2 21.8 22.2 24.7 32.6 19 20.5 20.9 20.3
Assume that the times spent on leisure activities by all adults are normally distributed. Using the 5% significance level, can you
conclude that the average amount of time spent by American adults on leisure activities has changed? (Hint: First calculate the
sample mean and the sample standard deviation for these data. Then make the test of hypothesis about u.)
Round the sample standard deviation to three decimal places.
19.32
7.670
S
true v
The claim is
SHOW HINT
hulu
tv
NOV
Transcribed Image Text:Chapter 09, Section 9.3, Problem 047 VERSION 1 BACK NEXT Your answer is partially correct. Try again. A past study claimed that adults in America spent an average of 18 hours a week on leisure activities. A researcher wanted to test this claim. She took a sample of 10 adults and asked them about the time they spend per week on leisure activities. Their responses (in hours) are as follows. 14.0 16.2 21.8 22.2 24.7 32.6 19 20.5 20.9 20.3 Assume that the times spent on leisure activities by all adults are normally distributed. Using the 5% significance level, can you conclude that the average amount of time spent by American adults on leisure activities has changed? (Hint: First calculate the sample mean and the sample standard deviation for these data. Then make the test of hypothesis about u.) Round the sample standard deviation to three decimal places. 19.32 7.670 S true v The claim is SHOW HINT hulu tv NOV
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