A null hypothesis can only be rejected at the 5% significance level if and only if ........

A null hypothesis can only be rejected at the 5% significance level if and only if ........
1). A 95% confidence interval includes the hypothesized value of the parameter
2). The null hypotheses includes sampling error
3). The null hypothesis is void
4). A 95% confidence interval does not include the hypothesized value of the parameter

option 4 is the right answer

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