calculate the 95% confidence interval for the mean systolic blood pressure chance. Does the oral contraceptives change the mean of the systolic blood pressure?

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calculate the 95% confidence interval for the mean systolic blood pressure chance. Does the oral contraceptives change the mean of the systolic blood pressure?
The systolic blood pressures (mmHg) of 12 women between the ages of 20 and 35 were
measured before and after administration of a newly developed oral contraceptive (Table
E4.25).
TABLE E4.25
Subject
Before
After
After-before difference, d,
1
122
127
5
2
126
128
2
3
132
140
8
4
120
119
-1
142
145
3
130
130
7
142
148
6
8
137
135
-2
128
129
1
10
132
137
5
11
128
128
12
129
133
4
Transcribed Image Text:The systolic blood pressures (mmHg) of 12 women between the ages of 20 and 35 were measured before and after administration of a newly developed oral contraceptive (Table E4.25). TABLE E4.25 Subject Before After After-before difference, d, 1 122 127 5 2 126 128 2 3 132 140 8 4 120 119 -1 142 145 3 130 130 7 142 148 6 8 137 135 -2 128 129 1 10 132 137 5 11 128 128 12 129 133 4
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