Question

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 (1 = not attractive; 10 = extremely attractive). Construct a confidence interval using a 95% confidence level. What do the results tell about the mean attractiveness ratings of the population of all adult females? 6, 8, 3, 10, 4, 5, 6, 8, 8, 9, 6,90 What is the confidence interval for the population mean? [<< (Round to one decimal place as needed.)

Answer 1

Solution

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А В С D E F Change only 1 Mean (x) 3 6.83 standard deviation (s) 2.17 Sample size (n) Confidence level (C) Degrees of freedom (df) Critical value (t*) 3 12 95 % 6 10 7 4 11 2.201 Lower Limit 5.5 9 Upper Limit 10 8.2 5.5< μ 8.2 11 12 9 We are 95% confident that the interval from 5.5 to 8.2 actually contains the true mean attractiveness rating of all adult 13 14 9 15 16 Ln Ln