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Answer to Question #44740 in Statistics and Probability for seongmin
Question #44740
To test the efficacy of a new cholesterol-lowering medication, 10 people are selected at random. Each has their LDL levels measured (shown below as Before), then take the medicine for 10 weeks, and then has their LDL levels measured again (After).
Subject Before After
1 132 114
2 174 175
3 147 140
4 179 152
5 122 100
6 192 158
7 125 98
8 119 93
9 200 191
10 173 139
Give a 93.1% confidence interval for μB−μA, the difference between LDL levels before and after taking the medication.
Confidence Interval =
at 93.1% confidence.
Give your answer as an open interval, in the form (A,B) where A is the lower bound and B is the upper bound.
Subject Before After
1 132 114
2 174 175
3 147 140
4 179 152
5 122 100
6 192 158
7 125 98
8 119 93
9 200 191
10 173 139
Give a 93.1% confidence interval for μB−μA, the difference between LDL levels before and after taking the medication.
Confidence Interval =
at 93.1% confidence.
Give your answer as an open interval, in the form (A,B) where A is the lower bound and B is the upper bound.
Expert's answer
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#340153 on Dec 2023
#340153 on Dec 2023
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Two random samples are taken, one from among UVA students and the other from among UNC students. Both groups are asked if academics are their top priority. A summary of the sample sizes and proportions of each group answering yes'' are given below: UVA (Pop. 1):UNC (Pop. 2):n1=95,n2=81,p̂ 1=0.711p̂ 2=0.65 Find a 92.1% confidence interval for the difference p1−p2 of the population proportions.
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