To test the effectiveness of a business school preparation course, 8 students took a general business test before and after the course. The results are given below. StudentExam ScoreBefore the CourseExam ScoreAfter the Course17207002740770390095047007105500580684090078208408640650 Use an appropriate hypothesis test, at 0.05 level of significance, to determine whether there is evidence of a difference between before and after scores of the students.What assumption is necessary to perform the hypothesis test in (a)?Construct a 95% confidence interval estimate of the mean difference in before and after scores. Interpret the interval. What is your decision based on this confidence interval estimate?

By applying a paired-'t' test , sample size,n= 8 Mean (d̄) =Σd/n = -240/8…

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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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To test the effectiveness of a business school preparation course, 8 students took a general business test before and after the course. The results are given below.

Student	Exam Score Before the Course	Exam Score After the Course
1	720	700
2	740	770
3	900	950
4	700	710
5	500	580
6	840	900
7	820	840
8	640	650

Use an appropriate hypothesis test, at 0.05 level of significance, to determine whether there is evidence of a difference between before and after scores of the students.
What assumption is necessary to perform the hypothesis test in (a)?
Construct a 95% confidence interval estimate of the mean difference in before and after scores. Interpret the interval. What is your decision based on this confidence interval estimate?

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