5. Suppose 7% of all households have no home telephone but depend completely on cell phones. Find the probability that in a random sample of 450 households, between 25 and 35 will have no home telephone. You may assume that the normal distribution applies.

College Algebra
10th Edition
ISBN:9781337282291
Author:Ron Larson
Publisher:Ron Larson
Chapter8: Sequences, Series,and Probability
Section8.7: Probability
Problem 11ECP: A manufacturer has determined that a machine averages one faulty unit for every 500 it produces....
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5. Suppose 7% of all households have no home telephone but depend
completely on cell phones. Find the probability that in a random sample of
450 households, between 25 and 35 will have no home telephone. You may
assume that the normal distribution applies.
Transcribed Image Text:5. Suppose 7% of all households have no home telephone but depend completely on cell phones. Find the probability that in a random sample of 450 households, between 25 and 35 will have no home telephone. You may assume that the normal distribution applies.
2. A random sample of size 1,100 is taken from a population in which the
proportion with the characteristic of interest is p = 0.28. Find the indicated
probabilities.
a. P(0.27≤ ≤0.29)P(0.27<p <0.29)
b. P(0.23<p<0.33)
Transcribed Image Text:2. A random sample of size 1,100 is taken from a population in which the proportion with the characteristic of interest is p = 0.28. Find the indicated probabilities. a. P(0.27≤ ≤0.29)P(0.27<p <0.29) b. P(0.23<p<0.33)
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