According to one poll, 55% of households in a certain region had no landline and only had cell phone service. Suppose a random sample of 50 households from the region is taken. a. Find the probability that exactly 25 of the households sampled only have cell phone service. The probability that exactly 25 only have cell phone service is (Type an integer or a decimal. Round to three decimal places as needed.)
According to one poll, 55% of households in a certain region had no landline and only had cell phone service. Suppose a random sample of 50 households from the region is taken. a. Find the probability that exactly 25 of the households sampled only have cell phone service. The probability that exactly 25 only have cell phone service is (Type an integer or a decimal. Round to three decimal places as needed.)
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
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
Transcribed Image Text:According to one poll, 55% of households in a certain region had no landline and only had cell phone service. Suppose
a random sample of 50 households from the region is taken.
...
a. Find the probability that exactly 25 of the households sampled only have cell phone service.
The probability that exactly 25 only have cell phone service is
(Type an integer or a decimal. Round to three decimal places as needed.)
Expert Solution

Step 1
Given information-
We have given a problem of the binomial distribution.
We have given that one poll, 55% of households in a certain region had no landline and only had cell phone service.
p = 0.55
No. of trial, n = 50
Let, X = number of households only had cell phone service.
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