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Suppose that in fact the proportion of the adult population who say their health is excellent is p = 0.29. (a) What is the probability that the sample proportion p of an SRS of size n = 1000 Who say their health is excellent lies between 26% and 32%?
Medical schools last year intended to specialize in family practice. What is the width of a 90% confidence interval for the proportion that plan to specialize in family prac
The following data resulted from a taste test of two different chocolate bars. The first number is a rating of the taste, which could range from 0 to 5, with a 5 indicating
How to do multiple regression using Excel and the Megastat plugin. Students are given step-by-step instructions on how to use the MegaStat plugin for Excel and told why Exce
If you observed three patients who have had medication errors in the sample, would you believe that he hospital's medication error rate was comparable to the national averag
A firm finds the coefficient of correlation between y annual sales and y = annual expenditure on research and development to be r = +0.90. Comment on the likely direction o
Data collected by a child development scientist produced a 95% confidence interval for the mean age, μ (in weeks) at which babies began to craw as [21.4, 31.6]
Out of the 109 males, 42% preferred Pepsi and out of the 53 females, 40% preferred Pepsi. Pepsi wanted to test to determine if the males preferred Pepsi more than females.
Five homes were recently sold in Oxnard Acres. Four of the homes sold for $400,000 while the fifth home sold for $2.5 million. Which measure of central tendency best represe
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