11 The 1-test for Two O t-1.496 Fail to reject the null hypothesis results sugge

Question

11 The 1-test for Two O t-1.496 Fail to reject the null hypothesis results suggest the performance of sales representatives does not significantly improve over the first 6 months of emplayment O t-1.496 Fail to reject the null hypothesis; results suggest the performance of sales representatives signifcantly mproves over the first 6 months of employment O t1496 Reject the null hypothesis, results suggest the performance of sales representatives significantly improves over the first 6 months of employment D Question 6 1 pts A researcher obtains t 280 for a repeated-measures study examining the difference in reading ability before and after completing a reading comprehension course among a sample of n 1 participants. Based on this t value, what is the correct decision for a two-tailed test? Reject the rul hypothesis with a-.05 but not with a ..0. Fail to reject the null hypothesis with either a-05 or a-01 Reject the n hypothesis with either a-.05 ora-.01. cannot make a decision without additional information | Question 7 1 pts 2 MacBook Air 80 1V0

Explanation / Answer

Degree of freedom of the t distribution for this test is equal to 15 (n-1)

Thus for alpha = 0.05, Tcritical = 2.131

for alpha = 0.01, Tcritical = 2.93

Since T = 2.8

Thus option a is correct.

Because for 0.05, T > Tcritical

And for 0.01, T < Tcritical

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