A researcher wants to conduct a before/after study on 11 subjects to determine if a new cholesterol medication results in higher HDL cholesterol readings.The null hypothesis is that the average difference is zero while the alternative hypothesis is that the average difference is not zero.Scores are obtained on the subjects both before and after taking the medication.After subtracting the after scores from the before scores, the average difference is computed to be -2.40 with a sample standard deviation of 1.21.A 0.05 level of significance is selected.Assume that the differences are normally distributed in the population.The table t value for this test is _______.
A)1.812
B)2.228
C)2.086
D)2.262
E)3.2467

Question

Quizplus · Accepted Answer

For a two-tailed t-test with 10 degrees of freedom (11 subjects - 1) at a 0.05 level of significance, the correct t-table value is 2.228.

A Researcher Wants to Conduct a Before/after Study on 11