Answered: Researchers want to know if a tutoring…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Researchers want to know if a tutoring program affects students’ ACT scores. They used a sample of twenty students and tested them before and after the tutoring program.

Use Excel to perform a dependent sample t-test to determine whether the difference between the mean pretest score and the mean posttest score is significantly different. Assume unequal variance.

Subject	Pretest	Posttest
1	21	25
2	30	33
3	25	26
4	28	31
5	31	34
6	16	16
7	19	21
8	21	24
9	26	27
10	34	34
11	22	23
12	18	24
13	14	17
14	19	23
15	24	25
16	33	30
17	25	27
18	26	26
19	22	24
20	19	18

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$Hypothesis Tests and Confidence Intervals for Equality of Variances$

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