According to one poll, 48% of households in a certain region still had landline phone service. Suppose a random sample of 60 households from the region is taken. Complete parts (a) through (d) below. a. Find the probability that exactly 25 of the households sampled still have a landline. The probability that exactly 25 still have a landline is (Type an integer or a decimal. Round to three decimal places as needed.) b. Find the probability that more than 25 households still have a landline.

College Algebra
7th Edition
ISBN:9781305115545
Author:James Stewart, Lothar Redlin, Saleem Watson
Publisher:James Stewart, Lothar Redlin, Saleem Watson
Chapter9: Counting And Probability
Section9.3: Binomial Probability
Problem 26E
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According to one poll, 48% of households in a certain region still had landline phone service. Suppose a random sample of 60 households from the region is taken.
Complete parts (a) through (d) below.
a. Find the probability that exactly 25 of the households sampled still have a landline.
The probability that exactly 25 still have a landline is
(Type an integer or a decimal. Round to three decimal places as needed.)
b. Find the probability that more than 25 households still have a landline.
Transcribed Image Text:Question Help ▼ According to one poll, 48% of households in a certain region still had landline phone service. Suppose a random sample of 60 households from the region is taken. Complete parts (a) through (d) below. a. Find the probability that exactly 25 of the households sampled still have a landline. The probability that exactly 25 still have a landline is (Type an integer or a decimal. Round to three decimal places as needed.) b. Find the probability that more than 25 households still have a landline.
b. Find the probability that more than 25 households still have a landline.
The probability that more than 25 still have a landline is .
(Type an integer or a decimal. Round to three decimal places as needed.)
C. Find the probability that at least 25 households still have a landline.
The probability that at least 25 still have a landline is.
(Type an integer or a decimal. Round to three decimal places as needed.)
d. Find the probability that between 20 and 25 households, inclusive, still have a landline.
The probability that between 20 and 25 households, inclusive, still have a landline is .
(Type an integer or a decimal. Round to three decimal places as needed.)
Enter your answer in each of the answer boxes.
P Pearson
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Transcribed Image Text:b. Find the probability that more than 25 households still have a landline. The probability that more than 25 still have a landline is . (Type an integer or a decimal. Round to three decimal places as needed.) C. Find the probability that at least 25 households still have a landline. The probability that at least 25 still have a landline is. (Type an integer or a decimal. Round to three decimal places as needed.) d. Find the probability that between 20 and 25 households, inclusive, still have a landline. The probability that between 20 and 25 households, inclusive, still have a landline is . (Type an integer or a decimal. Round to three decimal places as needed.) Enter your answer in each of the answer boxes. P Pearson Copyright © 2021 Pearson Education Inc. All rights reserved. Terms of Use | Privac search
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