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Pn 15453 Solutions

Content type
User Generated
Subject
Statistics
Type
Homework
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1. An entrepreneur claims that he has developed a program that can increase the IQ of adolescent
students. To test this claim, a psychologist administers the WISC (an IQ score for children) to a
group of students before and after completing the training program. Analyze the data to test the
entrepreneur’s claim.
Student
IQ before
IQ after
1
103
99
2
85
89
3
94
90
4
106
108
5
74
74
6
98
99
7
83
80
8
93
99
9
103
107
10
96
93
11
109
111
12
115
117
13
86
83
14
122
122
15
112
120
16
126
131
17
118
116
18
72
74
A) The output of paired t-test and histogram of differences between the IQ scores
before and after, obtained through SPSS are shown below:

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B) The results of the paired t-test for difference of means of two dependent samples
indicated a statistically not significant difference, t (17) = 1.111, p = .141 > 0.10,
between the IQ scores before (M = 99.72, SD = 15.833) and after (M = 100.67, SD
=17.029) the training.
C) The data provides insufficient evidence to support the entrepreneur’s claim that the
training program developed can increase the IQ of adolescent students.

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1. An entrepreneur claims that he has developed a program that can increase the IQ of adolescent students. To test this claim, a psychologist administers the WISC (an IQ score for children) to a group of students before and after completing the training program. Analyze the data to test the entrepreneur’s claim. Student IQ before IQ after 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 A) 103 85 94 106 74 98 83 93 103 96 109 115 86 122 112 126 118 72 99 89 90 108 74 99 80 99 107 93 111 117 83 122 120 131 116 74 The output of paired t-test and histogram of differences between the IQ scores before and after, obtained through SPSS are shown below: B) The results of the paired t-test for difference of means of two dependent samples indicated a statistically not significant difference, t (17) = –1.111, p = .141 > 0.10, between the IQ scores before (M = 99.72, SD = 15.833) and after (M = 100.67, SD =17.029) the training. C) The data provides insufficient evidence to support the entrepreneur’s claim that the training program developed can increase the IQ of adolescent students. 2. The staff at a local psychiatric facility wants to determine whether implementing a No Smoking rule significantly decreases the length of stay of inpatients. In order to test this claim, they compared the length of stay of patients admitted before a No Smoking rule was implemented to another group of patients admitted after the No Smoking rule was implemented. Evaluate the claim that the aver ...
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