If the number of smokers in a sample of 40 students selected from university A is 14 and the number of smokers in a sample of 380 students

Calculus For The Life Sciences
2nd Edition
ISBN:9780321964038
Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.
Chapter13: Probability And Calculus
Section13.2: Expected Value And Variance Of Continuous Random Variables
Problem 10E
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If the number of smokers in a sample
of 40 students selected from
university A is 14 and the number of
smokers in a sample of 380 students
selected from university B is 84. Then
the 99% confidence interval for the
difference between proportions of
smokers in the two universities (PB-
PA) is closest to
O a. (-0.1450,-0.1130)
O b. (-0.3310,0.0729)
O c. None of these
o d. (-0.3110,0.0534)
e. (-0.1430,-0.1150)
Transcribed Image Text:If the number of smokers in a sample of 40 students selected from university A is 14 and the number of smokers in a sample of 380 students selected from university B is 84. Then the 99% confidence interval for the difference between proportions of smokers in the two universities (PB- PA) is closest to O a. (-0.1450,-0.1130) O b. (-0.3310,0.0729) O c. None of these o d. (-0.3110,0.0534) e. (-0.1430,-0.1150)
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