Lori Jeffrey is a successful sales representative for a major publisher of college textbooks.Historically, Lori obtains a book adoption on 25% of her sales calls. Viewing her salescalls for one month as a sample of all possible sales calls, assume that a statistical analysisof the data yields a standard error of the proportion of .0625.a. How large was the sample used in this analysis? That is, how many sales calls did Lorimake during the month?b. Let p indicate the sample proportion of book adoptions obtained during the month.Show the sampling distribution of p.c. Using the sampling distribution of p, compute the probability that Lori will obtainbook adoptions on 30% or more of her sales calls during a one-month period

Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.5: Comparing Sets Of Data
Problem 1GP
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Lori Jeffrey is a successful sales representative for a major publisher of college textbooks.
Historically, Lori obtains a book adoption on 25% of her sales calls. Viewing her sales
calls for one month as a sample of all possible sales calls, assume that a statistical analysis
of the data yields a standard error of the proportion of .0625.
a. How large was the sample used in this analysis? That is, how many sales calls did Lori
make during the month?
b. Let p indicate the sample proportion of book adoptions obtained during the month.
Show the sampling distribution of p.
c. Using the sampling distribution of p, compute the probability that Lori will obtain
book adoptions on 30% or more of her sales calls during a one-month period

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