1. [1/5 Points] DETAILS PREVIOUS ANSWERS MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER 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 After an average work day, about how many hours do you have to relax or pursue activities that you enjoy? 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? 0 95% of Americans in this sample relax or pursue enjoyable activities between 3.53 and 3.83 hours on an average workday. 0 95% of Americans relax or pursue enjoyable activities between 3.53 and 3.83 hours on an average workday. O Using the methods of this survey will result in an interval that captures the true population mean 95% of the time. 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 average workday? Give your answer to two decimal places. hours d) Challenge! Find the 98% confidence interval for number of hours spent relaxing or pursuing enjoyable activities on an average workday. Give your endpoints to two decimal places. 98% confidence interval in hours: ( 2. [-/3 Points] DETAILS MY NOTES ASK YOUR TEACHER Which of the following will result in a wider confidence interval? Check all that apply. O Larger population mean O Larger sample mean Higher level of confidence O Larger population standard deviation O Larger sample size3. [1/5 Points] DETAILS PREVIOUS ANSWERS We wish to determine if average run times are changing in the annual Cherry Blossom Run. In 2006, the average run time for this 10-mile event was 93.29 minutes (93 minutes and 17 seconds). The data file CherryBlossomRun2012 contains a random sample of run times in 2012. We wish to test the hypothesis that run times have changed a) Which of the following is an appropriate set of hypotheses? Ho: M = 93.29; Ha: M > 93.29 O Ho: M = 93.29; Ha: H 93.29; Ha: M = 93.29 O Ho: M = 93.29; Ha: H # 93.29 Ho: M