Question: A school board is investigating two different academic programs. 20 students from each program were given the same exam, and the mean score was reported

A school board is investigating two different academic programs. 20 students from each program were given the same exam, and the mean score was reported for Program A and Program B. A 95% T confidence interval for the difference in mean exam score (assuming equal variances) is reported as

(-10.524, -0.476)

(a) What is the observed difference in mean exam score between Program A and Program B?

Responses

-5.5

-0.476

5.024

-10.524

Points possible: 2

Question 2

(b) What is the estimate of pooled standard deviation that was used to create this interval? (In the case of rounding errors, chose the closest option)

Responses

7.845

9.423

2.482

18.847

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