Please help me out with this question 2. 3. 4. Suppose you want to test the null

Question

Please help me out with this question

2.

3.

4.

Suppose you want to test the null hypothesis that 75.8. Given n = 25, = 6.75 and a significance level of -001, you calculate a t-statistic, when should you reject the null hypothesis? You may find this online calculator for the normal, Student's t, and other distributions helpful: O Reject Ho if the test statistic is greater than 2.492. O Reject Ho if the test statistic is greater than 2.479. O Reject Ho if the test statistic is less than -2.492 Reject Ho if the test statistic is less than-2.479.

Explanation / Answer

1) critical value = -t0.01,24 = -2.492

Option-C)

2) critical value = t0.05,39 = 1.685

Option-B)

3) critical value = t0.05/2,29 = 2.045

Option-D)

4) Z = (X - mean) / sd

or, -2.5 = (X - 65) / 8.4

or, X = 65 - 2.5 * 8.4

or, X = 44

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