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17- 20: In an August 2012 Gallup survey of 1,012 randomly selected U.
17- 20: In an August 2012 Gallup survey of 1,012 randomly selected U.S. adults (age 18 andover), 53% said that they were dissatisfied with the quality of education students receive inkindergarten through grade 12. They also report that the "margin of sampling error is plus orminus 4%."
17. What is the population of interest?_____________________________________________
18. What is the sample being used?_____________________________________________
19. What is the population parameter of interest, and what is the correct notation for thisparameter? What is the relevant statistic?__________________________________________________________________________________________
20. Find an interval estimate for the parameter of interest. Interpret it in terms ofdissatisfaction in the quality of education students receive. Use two decimal places inyour answer.__________________________________________________________________________________________
21-25: An Internet provider contacts a random sample of 300 customers and asks how many hours per week the customers use the Internet. It found the average amount of time spent on the Internet per week to be about 7.2 hours.
21. Define the parameter of interest, using the proper notation._____________________________________________
22. Use the information from the sample to give the best estimate of the population parameter._____________________________________________
23. Describe how to use the data to select one bootstrap sample. What statistic is recorded from this sample?__________________________________________________________________________________________
24. The standard error is about 0.458. Find and interpret a 95% confidence interval for the parameter. Round the margin of error to two decimal places.__________________________________________________________________________________________
25. Percentiles of the bootstrap distribution are provided. Use the percentiles to report a 95%confidence interval for the parameter.1% 2.5% 5% 10% 25% 50% 75% 90% 95% 97.5% 99%6.174 6.322 6.438 6.593 6.866 7.17 7.481 7.78 7.947 8.082 8.304__________________________________________________________________________________________
