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[answerhappygod]

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Listed below are the amounts of net worth (in millions of dollars) of the ten wealthiest celebrities in a country. Construct a 90% confidence interval. What does the result tell us about the population of all celebrities? Do the data appear to be from a normally distributed population as required? 240 208 177 168 159 156 154 O A. We are 90% confident that the interval from $ million to $ million actually contains the true mean net worth of all celebrities. (Round to one decimal place as needed.) What is the confidence interval estimate of the population mean μ? $million <<$ million (Round to one decimal place as needed.) What does the result tell us about the population of all celebrities? Select the correct choice below and, if necessary, fill in the answer box(es) to complete your choice. O B. Because the ten wealthiest celebrities are not a representative sample, this doesn't provide any information about the population of all celebrities. OC. We are confident that 90% of all celebrities have a net worth between $ (Round to one decimal place needed.) million and $ million. Do the data appear to be from a normally distributed population as required? 154 O A. No, but the points in the normal quantile plot lie reasonably close to a straight line and show some systematic pattern that is a straight line patter. OB. No, because the points lie reasonable close to a straight line, but there is a systematic pattern that is not a straight line pattern. OC. Yes, because the pattern of the points in the normal quantile plot is reasonably close to a straight line. OD. Yes, but the points in the normal quantile plot do not lie reasonably close to a straight line or show a systematic pattern that is a straight line pattern. 154 149

Words were displayed on a computer screen with background colors of red and blue. Results from scores on a test of word recall are given below. Use a 0.05 significance level to test the claim that the samples are from populations with the same standard deviation. Assume that both samples are independent simple random samples from populations having normal distributions. Does the background color appear to have an effect on the variation of word recall scores? n Red Background 34 15.07 Blue Background S 5.91 36 12.54 5.46 What are the null and alternative hypotheses? OA H₂:0² = 0² H₁:2² OC. H₂:0² = 0² H₁:0² *0² Identify the test statistic. F = (Round to two decimal places as needed.) Use technology to identify the P-value. The P-value is. (Round to three decimal places as needed.) What is the conclusion for this hypothesis test? OB. Ho: 00² H₁:0²=² OD. H₂:0² = 0² H₁:0² <0² OA. Fail to reject Ho. There is insufficient evidence to warrant rejection of the claim that the samples are from populations with the same standard deviation. OB. Reject Ho. There is insufficient evidence to warrant rejection of the claim that the samples are from populations with the same standard deviation. OC. Reject H₂. There is sufficient evidence to warrant rejection of the claim that the samples are from populations with the same standard deviation. OD. Fail to reject Ho. There is sufficient evidence to warrant rejection of the claim that the samples are from populations with the same standard deviation.

What is the conclusion for this hypothesis test? A. Fail to reject Ho. There is insufficient evidence to warrant rejection of the claim that the samples are from populations with the same standard deviation. B. Reject Ho. There is insufficient evidence to warrant rejection of the claim that the samples are from populations with the same standard deviation. C. Reject Ho. There is sufficient evidence to warrant rejection of the claim that the samples are from populations with the same standard deviation. D. Fail to reject Ho. There is sufficient evidence to warrant rejection of the claim that the samples are from populations with the same standard deviation. Does the background color appear to have an effect on the variation of word recall scores? A. No, the variation of word recall scores appears to be the same when the color is changed. B. Yes, the variation of word recall scores appears to be different when the color changed. C. No, the variation of word recall scores appears to be different when the color is changed. D. Yes, the variation of word recall scores appears to be the same when the color is changed.