A study was completed to determine whether a particular teaching method improved students' gymnastics abilities. The researcher was NOT interested in detecting whether the method decreased gymnastics ability. What is the smallest t-ratio that would allow rejection of the null hypothesis? (Assume 60 degrees of freedom, and use α = .05.)
A) 1.671
B) 2.000
C) 2.390
D) 2.660

Question

Quizplus · Accepted Answer

The smallest t-ratio that would allow rejection of the null hypothesis, given the researcher is only interested in detecting an improvement (not a decrease), indicates a one-tailed test. For a one-tailed test with α = .05 and 60 degrees of freedom, the critical t-value is 1.671. This value is the threshold above which the null hypothesis can be rejected, suggesting the teaching method has a statistically significant positive effect on gymnastics abilities.

A Study Was Completed to Determine Whether a Particular Teaching