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Suppose a fair die is rolled twice Let S be the sum of the numbers on the two rolls
a) What is the range of S?
b) Find the distribution S.
Paper airplanes. In preparation for a regional paper airplane competition, a student tried out her latest design. Construct a 95% confidence interval
Assume the standard deviation of the distribution is 2.5 pounds. Find the probability that the mean of a sample of 55 families will be between 17 & 18 pounds.
Describe the following correlation. The students with the highest grades in written French were also the students with the highest grade in spoken French.
What is a dummy variable, and how is it useful to multiple regression? Give an example of three dummy variables that could be used in describing your home town.
a. What are the two variables of interest? For each variable, state whether it's scale or ordinal.
Costs of Televisions Listed below are prices (in dollars) and quality rating scores of rare-projection televisions (based on data from Consumer Reports). All of the televisions have screen sizes of 55 in or 56 in.
People were polled on how many books they read the previous year. How many subject are needed to estimate the number of books read the previous year within one book with 99% confidence?
Critically discuss some concepts behind variance analysis? Why is it important to test for variances in your data? Explain. How is variance analysis used in health care administration?
If a household is known to have an income of at least $20,000, what is the probability that its annual income is in the $60,000-under $80,000 category?
Calculate the sample statistics and determine whether there is evidence that the mean blackness is less than 0.97. Write a memo to management that summarizes your conclusions.
Beer sales in a tavern are cyclical over the week, with large volume during weekend nights, lower volume during the beginning of the week, and somewhat higher.
At the time she was hired as a server at the restaurant, Beth was told, "You can average more than $20 a day in tips." Over the first 31 days she was employed, the mean daily amount of her tips was $21.76,
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