2. A professor wants to see how much students learn over the course of a semester. A pre test is given before the class begins to see what students know ahead of time, and the same test is given at the end of the semester to see what students know at the end. The data are below. Test for an improvement at the a = 0.05 level. Did scores increase? How much did scores increase? Pretest Posttest Xp 90 60 95 89 66 99 93 91 95 67 100 64 89 91 90 95 95 94 83 89 75 87 82 82 82 92 83 85 88 93 66 90 69 90 93 100 86 91 95 96

MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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2. A professor wants to see how much students learn over the course of a semester. A pre
test is given before the class begins to see what students know ahead of time, and the
same test is given at the end of the semester to see what students know at the end. The
data are below. Test for an improvement at the a = 0.05 level. Did scores increase? How
much did scores increase?
Pretest
90
Posttest
Xp
89
60
66
95
99
93
91
95
100
64
67
89
91
90
95
95
94
83
89
75
82
87
92
82
83
85
82
88
93
66
90
69
90
93
100
86
95
91
96
Transcribed Image Text:2. A professor wants to see how much students learn over the course of a semester. A pre test is given before the class begins to see what students know ahead of time, and the same test is given at the end of the semester to see what students know at the end. The data are below. Test for an improvement at the a = 0.05 level. Did scores increase? How much did scores increase? Pretest 90 Posttest Xp 89 60 66 95 99 93 91 95 100 64 67 89 91 90 95 95 94 83 89 75 82 87 92 82 83 85 82 88 93 66 90 69 90 93 100 86 95 91 96
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