Math 156 Sample Exam 3 Formulas Binomial mean np standard ...

8. a) Is it possible for a result not to be significant at the 1% level but considered significant
at the 5% level Explain.
b) If a two-sided test with H 0
: µ = 25 vs. H a
: µ ! 25 fails to reject the null hypothesis at the
5% level, what can you say about the corresponding 95% confidence interval
c) Suppose the null hypothesis is true. What is the chance the hypothesis test produces a result
that is deemed statistically significant at the 5% level