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Average monthly sales at Sharkey Chevy and Dave White Chevrolet are almost the same. Tom Sharkey, owner of Sharkey Chevy, believes that sales are more consistent. Below is the number of new cars sold at Sharkey in the last 7 months and over the past 8 months at Dave White. Do you agree with Mr. Sharkey? Use a significance level of .01.
Sharkey 98 78 54 57 68 64 70
Dave White 75 81 81 30 82 46 58 101
A researcher want to estimate the mean shoulder height of both male and female bears within 0.25 centimeters. Determine the minimum sample size required to construct a 99% confident interval
If you end up making a total of 200 bets of this type, how much money would you expect yourself to have won or lost at the end of the day?
The article "Rethinking Calcium Supplements" (U.S. Airways Magazine, October 2010) describes a study investigating whether taking calcium supplements
FeSO4 solution mixed with (NH4)2SO4 solution in 1:1 molar ratio gives the test of Fe2+ ion but CuSO4 solution mixed with aqueous ammonia in 1:4 molar ratio
What is the probability of randomly selecting a sample of 50 one bedroom apartments in this town and getting a sample mean of less then $530 if the population standard deviation is $100?
Research the statistics associated with diabetes. How many patients have some form of diabetes?
Why is the central limit theorem such a powerful tool? Can it really be applied in a setting that has many people under study?
Three cards are randomly selected from an ordinary deck of cards without replacement Compute the probability that the first card is a spade given that the second and third are spades.
Distinct random variable
The number of miles driven by a truck driver follows a uniform distribution between 200 and 800 miles.
Imagine a shift manager at a manufacturing plant is gathering data on the number of units workers assemble during two different shifts over 10 different days.
Consider the following data values of variables x and y. The equation of the least-squares regression line for this data is
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