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Gender and commercial preference, revisited. Refer to given Exercise. Construct a 95% confidence interval for the difference in gender proportions that favor Commercial B. Explain how you could have obtained these results from the calculations you did in Exercise.
Exercise Gender and commercial preference. A study was designed to compare two energy drink commercials. Each participant was shown the commercials in random order and asked to select the better one. Commercial A was selected by 44 out of 100 women and 79 out of 140 men. Give an estimate of the difference in gender proportions that favored Commercial A. Also construct a large-sample 95% confidence interval for this difference.
warren county telephone company claims in its annual report that the typical customer spends 60 per month on local and
Do the thinner cans appear to be strong enough so that they are not crushed when the top lids are pressed onto the sides?
The average time a subscriber spends reading the Wall Street Journal is 49 minutes. Assume that the standard deviation is 16 minutes and the time are normally distributed .
a statistics student plans to use a ti-84 plus calculator on her final exam from past experience she estimates that
If heads is a success when we flip a coin, getting a six is a success when we roll a die, and getting an ace is a success when we draw a card from an ordinary deck of 52 playing cards, find the mean and the standard deviation of the total number o..
Using a 5% level of significance, can we say that, generally there is important difference between satisfaction levels of mid country residents and coastal residents?
a student in a statistics class tossed a die 300 times and obtained the results shown in the table. is the die fair? in
1. in the basic economic order quantity eoq model if monthly demand is a constant 430 units the order quantity is 144
use the following information to answer the question. suppose that a recent poll of american households about pet
a. Estimate the standard deviation ofwhenx= 8. b. Develop a 95% confidence interval estimate of the expected value ofywhenx= 8.
In terms of PX (k ), find the PMF of the random variable Y if its probability-generating function is given as in each of the following cases.
question 1using the telephone numbers listed in your local directory as your population randomly obtain 20 samples of
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