A 90% confidence interval can be used to reject the null hypothesis of a two-sided test at the 10% significance level if and only if
A)a 90% confidence interval includes the hypothesized value of the parameter.
B)a 90% confidence interval does not include the hypothesized value of the parameter.
C)the null hypothesis is less than 0.05.
D)the null hypotheses includes sampling error is greater than 0.05.

Question

Quizplus · Accepted Answer

A 90% confidence interval not including the hypothesized value of the parameter indicates that the null hypothesis can be rejected at the 10% significance level (which complements the 90% confidence level), as it suggests the true parameter value is unlikely to be the hypothesized value under the null hypothesis.

A 90% Confidence Interval Can Be Used to Reject the Null