Suppose That the Population Mean for IQ Is 100 with a Standard

Multiple Choice

Suppose that the population mean for IQ is 100 with a standard deviation of 15. A researcher is testing a group 25 of talented youth. His sample has a mean of 112 with a standard deviation of 14.
What does the CI tell us about the sample of young talented youth?

A) The youth have IQs comparable to that of the population
B) There is no evidence that the youth's IQ are higher than that of the general population
C) There is insufficient information to make any claims about the sample based on a 95% confidence interval.
D) The youth are indeed talented as their average IQ is significantly higher than that of the population at the alpha = .05 level