Do smokers have higher blood pressure? A random sample of twenty-eight smokers was obtained and their systolic blood pressure was obtained. Another random sample of thirty non-smokers was obtained and their systolic blood pressure was obtained. Nonsmokers Blood Pressure 130 Smokers Blood Pressure 127 134 143 106 116 141 135 138 118 121 126 129 137 130 123 118 117 136 135 129 117 118 125 144 138 131 122 112 115 128 136 140 117 111 127 131 133 140 118 128 116 137 133 133 124 119 116 139 131 139 126 116 114 136 125 109 113 a. At the 5% significance level, what conclusion can be reached? b. Is there a possible confounding factor that was not controlled for in the experiment?
Do smokers have higher blood pressure? A random sample of twenty-eight smokers was obtained and their systolic blood pressure was obtained. Another random sample of thirty non-smokers was obtained and their systolic blood pressure was obtained. Nonsmokers Blood Pressure 130 Smokers Blood Pressure 127 134 143 106 116 141 135 138 118 121 126 129 137 130 123 118 117 136 135 129 117 118 125 144 138 131 122 112 115 128 136 140 117 111 127 131 133 140 118 128 116 137 133 133 124 119 116 139 131 139 126 116 114 136 125 109 113 a. At the 5% significance level, what conclusion can be reached? b. Is there a possible confounding factor that was not controlled for in the experiment?
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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Transcribed Image Text:Homework 7.3
7.3.1
1
100
1 pot
1. Do smokers have higher blood pressure? A random sample of twenty-eight smokers was obtained
and their systolic blood pressure was obtained. Another random sample of thirtynon-smokers was
obtained and their systolic blood pressure was obtained,
Uploa
Smokers Blood Pressure
134
Nonsmokers Blood Pressure
130
126
106
116
127
141
-129
136
143
135
138
118
121
137
130
123
118
117
135
129
117
118
125
131
12,
112
115
144
128
-131
137
139
136
138
3.
136
140
117
111
127
1p
133
140
118
128
116
133
133
124
119
116
a.
131
139
125
116
114
125
109
113
14
a. Atthe 5% sgnificance level. what conclusion can be reached
b. L there a possible confounding factor that was not controlled for in the experiment?
15
3
b.
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