In 2016 the Better Business Bureau settled 76% of complaints they received in the United States. Suppose you have been hired by the Better Business Bureau to investigate the complaints they received this year involving new car dealers. You plan to select a sample of new car dealer complaints to estimate the proportion of complaints the Better Business Bureau is able to settle. Assume the population proportion of complaints settled for new car dealers is 0.76, the same as the overall proportion of complaints settled in 2016. Use the z-table. a. Suppose you select a sample of 200 complaints involving new car dealers. Show the sampling distribution of p. E(F) = (to 2 decimals) (to 4 decimals) = So b. Based upon a sample of 200 complaints, what is the probability that the sample proportion will be within 0.07 of the population proportion (to 4 decimals)? probability = c. Suppose you select a sample of 490 complaints involving new car dealers. Show the sampling distribution of p. E(F) = (to 2 decimals) (to 4 decimals)
In 2016 the Better Business Bureau settled 76% of complaints they received in the United States. Suppose you have been hired by the Better Business Bureau to investigate the complaints they received this year involving new car dealers. You plan to select a sample of new car dealer complaints to estimate the proportion of complaints the Better Business Bureau is able to settle. Assume the population proportion of complaints settled for new car dealers is 0.76, the same as the overall proportion of complaints settled in 2016. Use the z-table. a. Suppose you select a sample of 200 complaints involving new car dealers. Show the sampling distribution of p. E(F) = (to 2 decimals) (to 4 decimals) = So b. Based upon a sample of 200 complaints, what is the probability that the sample proportion will be within 0.07 of the population proportion (to 4 decimals)? probability = c. Suppose you select a sample of 490 complaints involving new car dealers. Show the sampling distribution of p. E(F) = (to 2 decimals) (to 4 decimals)
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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Plz answer a,b and c part only in 20 minutes and gets thumb up
Transcribed Image Text:In 2016 the Better Business Bureau settled 76% of complaints they received in the United States. Suppose you have been hired by the Better
Business Bureau to investigate the complaints they received this year involving new car dealers. You plan to select a sample of new car dealer
complaints to estimate the proportion of complaints the Better Business Bureau is able to settle. Assume the population proportion of complaints
settled for new car dealers is 0.76, the same as the overall proportion of complaints settled in 2016. Use the z-table.
a. Suppose you select a sample of 200 complaints involving new car dealers. Show the sampling distribution of p.
E(F) =
(to 2 decimals)
(to 4 decimals)
b. Based upon a sample of 200 complaints, what is the probability that the sample proportion will be within 0.07 of the population proportion (to
4 decimals)?
probability =
c. Suppose you select a sample of 490 complaints involving new car dealers. Show the sampling distribution of p.
E(F) =
(to 2 decimals)
(to 4 decimals)
d. Based upon the larger sample of 490 complaints, what is the probability that the sample proportion will be within 0.07 of the population
proportion (to 4 decimals)?
probability =
e. As measured by the increase in probability, how much do you gain in precision by taking the larger sample in part (d)?
The probability of the sample proportion being within 0.07 of the population mean is increased by
3 decimals). There is a gain in
precision by
Select your answer - v the sample size.
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