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Consumer Reports (January 2005) indicates that profit margins on extended warranties are much greater than on the purchase of most products.3 In this exercise we consider a major electronics retailer that wishes to increase the proportion of customers who buy extended warranties on digital cameras. Historically, 20 percent of digital camera customers have purchased the retailer's extended warranty. To increase this percentage, the retailer has decided to offer a new warranty that is less expensive and more comprehensive. Suppose that three months after starting to offer the new warranty, a random sample of 500 customer sales invoices shows that 152 out of 500 digital camera customers purchased the new warranty.
Find a 95 percent confidence interval for the proportion of all digital camera customers who have purchased the new warranty. Are we 95 percent confident that this proportion exceeds .20?
q1. in a pure exchange economy with two goods g and h two traders amos and elise have cobb-douglas utility functions.
What is the annualized excess performance (Jensen's Alpha) of the firms that DID NOTreplace their CEO and describe the assumptions behind the classical linear regression model and the three diagnostic tests we discussed in class, the commands you w..
Describe the error in the conclusion
Find the indicated probabilities using Poisson distribution. Then determine if the events are unusual. A newspaper finds that the mean of typo error is five. Find the probability that a) exactly for errors found on a page, b)at most for errors ..
Find the critical value χ 2L corresponding to a sample size of 19 and a confidence level of 90 percent.
What other factors besides price might be included in this equation and do you foresee any difficulty in obtaining these additional data or incorporating them in the regression analysis?
It is known that 35% of the members of a certain population suffer from one or more chronic diseases. What is the probability that in a sample of 200 subjects drawn at random from this population 80 or more will have at least one chronic disea..
Explain the assumptions underlying the two-sample test of means.When can one assume normality for two proportions?
What demographic variables were measured at least at the interval level of measurement and what statistics were used to describe the length of labor in this study? Were these appropriate?
question 1- search the internet and the articles database in the library for a real-life example of correlation. for a
An attendant at a car was is paid according to the number of cars that pass through.
Suppose you are in the market to purchase a used car. To make an informed decision regarding your purchase, you would like to collect as much information as possible. Among the information you might consider are the typical price of the car, the typi..
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