Telemarketers obtain names and telephone numbers from several sources. To determine whether one particular source is better than a second, random samples of 400 and 420 names and numbers were obtained from sources A and B, respectively of which 52 and 46 from A and B made a purchase. Construct a 99% confidence interval for PA PB, the difference in the proportions of customers making a purchase from the two sources.

Telemarketers obtain names and telephone numbers from several sources. To determine whether one particular source is better than a second, random samples of 400 and 420 names and numbers were obtained from sources A and B, respectively of which 52 and 46 from A and B made a purchase. Construct a 99% confidence interval for PA PB, the difference in the proportions of customers making a purchase from the two sources.

College Algebra (MindTap Course List)

12th Edition

ISBN:9781305652231

Author:R. David Gustafson, Jeff Hughes

Publisher:R. David Gustafson, Jeff Hughes

Chapter8: Sequences, Series, And Probability

Section8.7: Probability

Problem 7E: List the sample space of each experiment. Selecting a letter of the alphabet

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