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A contractor desires to build new homes with fireplaces. He read the results that states that 80% of all home buyers wanted a fireplace. In order to test this figure, he selected a sample of 90 home buyers and found that 60 wanted a fireplace. At a = 0.02, should he arrive at the same conclusion as the survey? Construct a corresponding confidence interval for the population parameter.

A contractor desires to build new homes with fireplaces. He read the results that states that 80% of all home buyers wanted a fireplace. In order to test this figure, he selected a sample of 90 home buyers and found that 60 wanted a fireplace. At a = 0.02, should he arrive at the same conclusion as the survey? Construct a corresponding confidence interval for the population parameter.

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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If you wanna use formula kindly use the formula mentioned in the question. Kindly solve both Questions. I will give u upvote ?. Thanks!!
9. A contractor desires to build new homes with fireplaces. He read the results that states that 80% of all home buyers wanted a fireplace. In order to test this figure, he selected a sample of 90 home buyers and found that 60 wanted a fireplace. At a = 0.02, should he arrive at the same conclusion as the survey? Construct a corresponding confidence interval for the population parameter.
Transcribed Image Text:9. A contractor desires to build new homes with fireplaces. He read the results that states that 80% of all home buyers wanted a fireplace. In order to test this figure, he selected a sample of 90 home buyers and found that 60 wanted a fireplace. At a = 0.02, should he arrive at the same conclusion as the survey? Construct a corresponding confidence interval for the population parameter.
5. A recent study claims that the average age of murder victims in a small city was less than or equal to 23.2 years. A sample of 18 recent victims had a mean of 22.6 years and a standard deviation of 2 years. At a = 0.05, is the average age higher than originally believed? Assume that the variable is approximately normally (X-t₁7,95 S/√n) ∞) distributed. Construct a corresponding confidence interval for the population parameter. (x-t₁7,.95 S/√∞0)
Transcribed Image Text:5. A recent study claims that the average age of murder victims in a small city was less than or equal to 23.2 years. A sample of 18 recent victims had a mean of 22.6 years and a standard deviation of 2 years. At a = 0.05, is the average age higher than originally believed? Assume that the variable is approximately normally (X-t₁7,95 S/√n) ∞) distributed. Construct a corresponding confidence interval for the population parameter. (x-t₁7,.95 S/√∞0)
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