IQ scores from the general population form a normal distribution with a m = 100 and s = 15.  However,...

IQ scores from the general population form a normal distribution with a m = 100 and s = 15.  However, data indicate that children’s intelligence may be affected if their mothers have German measles during pregnancy.  Using hospital records, a researcher obtained a sample of n = 25 school children whose mothers all had German measles during their pregnancies.  The average IQ for this sample was x̅= 94.  Do these data indicate that German measles have a significant effect on IQ?  Test with p=.05.

State the alternative/research hypothesis

1.           In written format

Answer:

2.           In mathematical format  

Answer: