Suppose you work as a manager for a large clothing store. You are consideringintroducing a loyalty program to encourage customers to spend more at yourstore. Before rolling out your program to the public, you want to do a smallexperiment to estimate its effectiveness. You offer the loyalty program to 22random customers, and also observed the sales of 17 random customers whodid not get the program as a control group. The customers that were part of theloyalty program had average monthly sales of $309.90 and a sample standarddeviation of $47.14. For the control group, the customers had an averagemonthly sales of $261.93 and a sample standard deviation of $63.25.Given a 95% confidence interval critical value of t* = 2. 10, what is theupper bound (upper end) of a 95% confidence interval for the differencebetween two averages? Use (μloyalty programHno loyalty program) forthe order.

Answered: Image /qna-images/answer/221fe1c2-a8e3-48d8-b614-1bf9f26cc587.jpg

Answered: Suppose you work as a manager for a…

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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several years ago, the Gallup Organization conducted a random survey of 1018 adults aged 18 or older living in the United States and asked if you had $1000 to spend. Do you think investing it in the stock market would be a good idea? The Gallup study concluded that 54% of those surveyed said they thought investing in the stock. Market was a good idea. A statician would like to take a random sample of 200 of those 1018 adults and ask them the same question again to see if people change their minds over time. Based on the Gallup survey a statician specs that 54% of their sample will say that investing $1000 in the stock market would be a good idea give or take 2.1% find the chance as a percentage that institutions random sample 51% or more of them would say that investing $1000 in the stock market is a good idea write your answer as a percentage.
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A contributor for the local newspaper is writing an article for the weekly fitness section. To prepare for the story, she conducts a study to compare the exercise habits of people who exercise in the morning to the exercise habits of people who work out in the afternoon or evening. She selects three different health centers from which to draw her samples. The 56 people she sampled who work out in the morning have a mean of 4.4 hours of exercise each week. The 63 people surveyed who exercise in the afternoon or evening have a mean of 4.2 hours of exercise each week. Assume that the weekly exercise times have a population standard deviation of 0.8 hours for people who exercise in the morning and 0.7 hours for people who exercise in the afternoon or evening. Let Population 1 be people who exercise in the morning and Population 2 be people who exercise in the afternoon or evening. Step 1 of 2: Construct a 99% confidence interval for the true difference between the mean amounts of…

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