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Nicotine patches are often used to help smokers quit. Does adding antidepressants to the nicotine patches help? A randomized double-blind experiment assigned 256 to receive a patch that includes the antidepression drug bupropion and 250 smokers who wanted to stop to receive regular nicotine patches. After a year, 89 in the patch & drug group had abstained from smoking and 47 subjects in the nicotine patch group.
p^patch & drug= (3 decimals - this is the treatment group)
p^patch= (3 decimals - this is the control group)
Use StatCrunch ( Stat > Proportion Stats > Two Sample > With Summary) to find a 95% confidence interval for the difference (treatment minus control) in the proportion of smokers who quit.
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Caselet on McDonald’s vs. Burger King - Waiting time
Generate descriptive statistics. Create a stem-and-leaf plot of the data and box plot of the data.
Problems on Sampling Variability and Standard Error and Confidence Intervals
Estimate the population mean
Conduct a marketing experiment in which students are to taste one of two different brands of soft drink
Find out the probability
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