4. A sample of 36 yields a mean weight of 1.02 pounds per box. Construct a 95% confidence interval for the mean weight of all boxes. Assume that the weight is normally distributed with a population standard deviation of 0.3 pound. x=1.02 n=36 60.3 Answers Point Estimate Standard Error Margin of Error Alpha Critical Value Confidence interval 5. During a national debate on changes to health care, a cable news service performs an opinion poll of 500 small business owners. It shows that 65% of small business owners do not approve of health care changes. Develop a 95% confidence interval for the proportion opposing health care changes. Use 3 decimal places. Answers Point Estimate Standard Error Margin of Error Alpha Critical Value Confidence interval 6. A car dealership would like to estimate the mean mpg of its new model car with 90% confidence. The population is normally distributed; however we are taking a sample of 16 cars with a sample mean of 96.52 and a sample standard deviation of 10.70. Calculate a 90% confidence interval for the population mean using this sample data. Answers Point Estimate Standard Error Margin of Error Alpha Critical Value Confidence interval 4. A sample of 36 yields a mean weight of 1.02 pounds per box. Construct a 95% confidence interval for the mean weight of all boxes. Assume that the weight is normally distributed with a population standard deviation of 0.3 pound. x=1.02 n=36 60.3 Answers Point Estimate Standard Error Margin of Error Alpha Critical Value Confidence interval 5. During a national debate on changes to health care, a cable news service performs an opinion poll of 500 small business owners. It shows that 65% of small business owners do not approve of health care changes. Develop a 95% confidence interval for the proportion opposing health care changes. Use 3 decimal places. Answers Point Estimate Standard Error Margin of Error Alpha Critical Value Confidence interval 6. A car dealership would like to estimate the mean mpg of its new model car with 90% confidence. The population is normally distributed; however we are taking a sample of 16 cars with a sample mean of 96.52 and a sample standard deviation of 10.70. Calculate a 90% confidence interval for the population mean using this sample data. Answers Point Estimate Standard Error Margin of Error Alpha Critical Value Confidence interval