If a 95 percent confidence interval about a difference between means is -2.31 to 24.62, the null hypothesis may be?

a. rejected at the .01 level

b. rejected at the .05 level

c. rejected, but more information is necessary before a particular level can be chosen

d. retained

Suppose you calculated a 95 percent confidence interval about the difference between two paired means. The resulting confidence interval was -2.10 to 2.10. Knowing this, you can

Group of answer choices

a. reject the null hypothesis at the .05 level

b. reject the null hypothesis at the .01 level

c. retain the null hypothesis

d. additional information is needed