c) What was the sample mean of the number of hours spent relaxing or pursuing enjoyable activities on an average workday? Give your answer to two decimal places. hours

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
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Chapter10: Statistics
Section: Chapter Questions
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C.

The General Social Survey (GSS) is a sociological survey used to collect data on demographic characteristics and attitudes of residents of the United States. In 2010, the survey collected
responses from 1,154 US residents. The survey is conducted face-to-face with an in-person interview of a randomly-selected sample of adults. One of the questions on the survey is
DAfter an average work day, about how many hours do you have to relax or pursue activities that you enjoy?D A 95% confidence interval from the 2010 GSS survey is 3.53 to 3.83
hours.
a) Which of the following is a valid interpretation of this confidence interval?
95% of Americans relax or pursue enjoyable activities between 3.53 and 3.83 hours on an average workday.
Using the methods of this survey will result in an interval that captures the true population mean 95% of the time.
O 95% of Americans in this sample relax or pursue enjoyable activities between 3.53 and 3.83 hours on an average workday.
b) Suppose the researchers think a 90% confidence level would be more appropriate for this interval. Will this new interval be smaller or larger than the 95% confidence interval?
Assume the standard deviation has remained constant since 2010.
O Larger
Smaller
c) What was the sample mean of the number of hours spent relaxing or pursuing enjoyable activities on an ave
ge workday? Give your answer to two decimal places.
hours
Transcribed Image Text:The General Social Survey (GSS) is a sociological survey used to collect data on demographic characteristics and attitudes of residents of the United States. In 2010, the survey collected responses from 1,154 US residents. The survey is conducted face-to-face with an in-person interview of a randomly-selected sample of adults. One of the questions on the survey is DAfter an average work day, about how many hours do you have to relax or pursue activities that you enjoy?D A 95% confidence interval from the 2010 GSS survey is 3.53 to 3.83 hours. a) Which of the following is a valid interpretation of this confidence interval? 95% of Americans relax or pursue enjoyable activities between 3.53 and 3.83 hours on an average workday. Using the methods of this survey will result in an interval that captures the true population mean 95% of the time. O 95% of Americans in this sample relax or pursue enjoyable activities between 3.53 and 3.83 hours on an average workday. b) Suppose the researchers think a 90% confidence level would be more appropriate for this interval. Will this new interval be smaller or larger than the 95% confidence interval? Assume the standard deviation has remained constant since 2010. O Larger Smaller c) What was the sample mean of the number of hours spent relaxing or pursuing enjoyable activities on an ave ge workday? Give your answer to two decimal places. hours
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