According to the University of Nevada Center for Logistics Management, 9% of all merchandise sold in the United States gets returned. A Houston department store sampled 100 items sold in January and found that 12 of the items were returned.a. Construct a point estimate of the proportion of items returmed for the population of sales transactions at the Houston store.(to 4 decimals)b. Construct a 98% confidence interval for the proportion of returns at the Houston store.) (to 4 decimals)c. Is the proportion of returns at the Houston store significantly different from the returns for the nation as a whole? Provide statistical support for your answer.Since the confidence interval - Select your answer - V 0.09, we conclude that the return rate for the Houston store -Select your answer - V the U.S. national return rate.

Given: n=100Number of items returned, x=12

Answered: According to the University of Nevada…

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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According to recent data by the American Marketing Association, 76.5%of people in the 18-24 age group used social media in 2017. You want to find out what the social media proportion is among your classmates who are all between 18 and 24 years old. Suppose you obtain a random sample of 229 students and find that 202 students in this sample are active social media users. Complete parts a through c below. a. Construct a 99% confidence interval to estimate the actual proportion of social media users. A 99% confidence interval to estimate the actual proportion has a lower limit of------ and an upper limit of------- (Round to three decimal places as needed.) b. What is the margin of error for this sample? c. Is there evidence that this proportion matches that of the overall population based on the sample?
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