A researcher reports the following result for a two-tailed test at a .05 level of significance,t(30)= 2.320,and correctly decides to retain the null hypothesis.

Question

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The critical value for a two-tailed t-test with 30 degrees of freedom at a .05 level of significance is +/- 2.042. Since the calculated t-value (2.320) exceeds the critical value, the result is statistically significant and the null hypothesis should be rejected. Therefore, the correct answer is B - the researcher should reject the null hypothesis, not retain it.

A Researcher Reports the Following Result for a Two-Tailed Test