9. The researchers are not satisfied with their confidence interval and want to do another study to find a shorter confidence interval. What should they change to ensure they find a shorter confidence interval?
a) They should increase their confidence level and increase their sample size.
b) They should increase their confidence level but decrease their sample size.
c) They should decrease their confidence level but increase their sample size.
d) They should decrease their confidence level and decrease their sample size.
Answer __________
10. Suppose the p-value is .044. What will the conclusion be at alpha levels of .10, .05, and .01?
a) We will reject H₀ at alpha=.10, but not at alpha=.05
b) We will reject H₀ at alpha=.10 or .05, but not at alpha=.01
c) We will reject H₀ at alpha=.10, .05; or .01
d) We will not reject H₀ at alpha=.10, .05, or .01