For a particular sample, the 0.95 confidence interval for the population mean is from 11 to 17. You are asked to test the hypothesis that the population mean is 18 against a two-sided alternative....

For a particular sample, the 0.95 confidence interval for the population mean is from 11 to 17. You are asked to test the hypothesis that the population mean is 18 against a two-sided alternative. Your decision is:

(1) Fail to reject the null hypothesis, α = 0:05.

(2) Reject the null hypothesis, α = 0:05.

(3) There is insufficient information to decide.