he teacher from Problem 21 also tried a different ap- roach to determining whether changing answers helps r hurts exam grades. In another class, students were old to review their final exams and change any answers they wanted to before turning them in. However, the students had to indicate both the original answer and the changed answer for each question. The teacher graded cach exam twice, once using the set of original answers and once with the changes. In the class of n = 22 stu- dents, the exam scores improved by an average 0l Mp = 2.5 points with the changed answers. The standard D. deviation for tho dif
he teacher from Problem 21 also tried a different ap- roach to determining whether changing answers helps r hurts exam grades. In another class, students were old to review their final exams and change any answers they wanted to before turning them in. However, the students had to indicate both the original answer and the changed answer for each question. The teacher graded cach exam twice, once using the set of original answers and once with the changes. In the class of n = 22 stu- dents, the exam scores improved by an average 0l Mp = 2.5 points with the changed answers. The standard D. deviation for tho dif
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
Related questions
Question
Transcribed Image Text:tailed test at the .01 level of significon
=D2.5 points with the changed answers. The standard
deviation for the difference scores was s = 3.1. Are the
Matched
Pair
No-Change
Section
Change
Section
71
86
#1
68
80
# 2
88
91
#3
65
74
# 4
73
82
#5
81
89
# 6
85
85
#7
86
88
# 8
65
76
#9
The teacher from Problem 21 also tried a different ap-
proach to determining whether changing answers helps
or hurts exam grades. In another class, students were
told to review their final exams and change any answers
they wanted to before turning them in. However, the
students had to indicate both the original answer and the
changed answer for each question. The teacher graded
cach exam twice, once using the set of original answers
and once with the changes. In the class of n =
dents, the exam scores improved by an average Of MD
22 stu-
ation for the difference scores was s = 3.1. Are the
ala sufficient to conclude that rethinking and changing
wers can significantly improve scores? Use a olle-
%3D
23
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