Question 1168609: 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?
5,9,2,9,7,4,6,8,8,9,4,8
Need to find
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round to one decimal place as needed
Answer by Boreal(15235)   (Show Source):
You can put this solution on YOUR website! mean is 6.58
s=2.35
95% T-half-interval is t(0.975,df=11)*s/sqrt(n)
=2.201*2.35/sqrt(12)
=1.49. Add to and subtract from x bar to get CI limits
(5.1, 8.1). The true mean value is unknown and unknowable, but one can be 95% confident it lies in the interval shown.
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