A sample is used to obtain a 95 confidence interval for the

A sample is used to obtain a 95% confidence interval for the mean of a population. The confidence interval goes from 15 to 19. If the same sample had been used to test the null hypothesis that the mean of the population is equal to 20 versus the alternative hypothesis that the mean of the population differs from 20, the null hypothesis could be accepted at a level of significance of 0.02

Solution

We cannot decide. The CI was given at 95% CI, it should have been at 98% level. HAd it been at 98% level, we could have rejected null at significance level of 0.02 if CI did not contain 20. Now we cannot say anything,