13. In a study of speed​ dating, male subjects were asked to rate the attractiveness of their female​ dates, and a sample of the results is listed below (1equals=not attractive; 10equals=extremely...


13. In a study of speed​ dating, male subjects were asked to rate the attractiveness of their female​ dates, and a sample of the results is listed below (1equals=not attractive; 10equals=extremely ​attractive). Construct a confidence interval using a 99​% confidence level. What do the results tell about the mean attractiveness ratings of the population of all adult​ females?


7,8,2,9,4,6,8,7,9,10,3,8
What is the confidence interval estimate of the population mean
μ​?



14.


A food safety guideline is that the mercury in fish should be below 1 part per million​ (ppm). Listed below are the amounts of mercury​ (ppm) found in tuna sushi sampled at different stores in a major city. Construct a
99​%
confidence interval estimate of the mean amount of mercury in the population. Does it appear that there is too much mercury in tuna​ sushi?



0.51, 0.70, 0.10, 0.91, 1.24, 0.55, 0.84

What is the confidence interval estimate of the population mean
μ​?




15.

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?


267, 207, 184, 161, 156, 154, 146, 146, 146, 141
What is the confidence interval estimate of the population mean
μ​?






Jun 01, 2022
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