
Introductory Statistics
1st Edition
ISBN: 9781938168208
Author: Barbara Illowsky, Susan Dean
Publisher: OpenStax College
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Textbook Question
Chapter 13, Problem 60H
Suppose a group is interested in determining whether teenagers obtain their drivers licenses at approximately the same
average age across the country. Suppose that the following data are randomly collected from five teenagers in each region
of the country. The numbers represent the age at which teenagers obtained their drivers licenses.
Northeast | South | West | Central | East |
16.3 | 16.9 | 16.4 | 16.2 | 17.1 |
16.1 | 16.5 | 16.5 | 16.6 | 17.2 |
16.4 | 16.4 | 16.6 | 16.5 | 16.6 |
16.5 | 16.2 | 16.1 | 16.4 | 16.8 |
x ¯= | ----- | ----- | ----- | ----- |
S2 = | ----- | ----- | ----- | ----- |
Table 13.19
State the hypotheses.
H0: ____________
Ha: ____________
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PEER REPLY 1:
Choose a classmate's Main Post.
1. Indicate a range of values for the independent variable (x) that is reasonable
based on the data provided.
2. Explain what the predicted range of dependent values should be based on
the range of independent values.
In a company with 80 employees, 60 earn $10.00 per hour and 20 earn $13.00 per
hour.
Is this average hourly wage considered representative?
The following is a list of questions answered correctly on an exam. Calculate the
Measures of Central Tendency from the ungrouped data list.
NUMBER OF QUESTIONS ANSWERED CORRECTLY ON AN APTITUDE EXAM
112
72
69
97
107
73
92
76
86
73
126
128
118
127
124
82
104
132
134
83
92
108
96
100
92
115
76
91
102
81
95
141
81
80
106
84
119
113
98
75
68
98
115
106
95
100
85
94
106
119
Chapter 13 Solutions
Introductory Statistics
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