A marketing researcher for a phone company surveys 176 people and finds that the proportion of customers who are likely to switch providers when their contract expires is 11%. Complete parts a) and b) below. a) What is the standard deviation of the sampling distribution of the proportion? SD(p)=? (Round to four decimal places as needed.) Part 2 If she wants to reduce the standard deviation by half, how large a sample would she need? n=? (Type a whole number.)
A marketing researcher for a phone company surveys 176 people and finds that the proportion of customers who are likely to switch providers when their contract expires is 11%. Complete parts a) and b) below. a) What is the standard deviation of the sampling distribution of the proportion? SD(p)=? (Round to four decimal places as needed.) Part 2 If she wants to reduce the standard deviation by half, how large a sample would she need? n=? (Type a whole number.)
Glencoe Algebra 1, Student Edition, 9780079039897, 0079039898, 2018
18th Edition
ISBN:9780079039897
Author:Carter
Publisher:Carter
Chapter10: Statistics
Section10.4: Distributions Of Data
Problem 19PFA
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A marketing researcher for a phone company surveys 176 people and finds that the proportion of customers who are likely to switch providers when their contract expires is 11%. Complete parts a) and b) below.
a) What is the standard deviation of the sampling distribution of the proportion?
SD(p)=?
(Round to four decimal places as needed.)Part 2
If she wants to reduce the standard deviation by half, how large a sample would she need?
n=?
(Type a whole number.)
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