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Question: Using the donations database on the companion site, and using only people who made a donation in response to the current mailing, consider predicting the amount of a donation (named "Donation_D1" in the worksheet) from the median years of school completed by adults in the neighborhood ("School_D1") and the number of promotions received before this mailing ("Promotions_D1").
a. Find the regression equation and the coefficient of determination.
b. Is there a significant relationship overall?
c. Which, if any, of the explanatory variables has a significant t test? What does this tell you?
the table below summarizes results from a study of people who refused to answer survey questions. a market researcher
The state of Texas college admission board has set a standard for automatic acceptances to any university at top 10% of any graduating class will be allowed to attend any university in the state.
if the average number of textbooks in a professors offices is 16 the standard deviation is 5 and the average age of
Bob enjoys making candy and some friends have encouraged him to open a candy-making business. To see if the local citizens buy enough candy,
8500 is deposited into an account paying 8% annually, to provide four annual equal amount withdraws beginning in one year
lionel wants to play the crane machine arcade game the one with the mechanical claw to win a stuffed animal. he is good
Report descriptive statistics, assumptions tests, effect sizes (partial eta) as well as tests of statistical significance.
The International Coffee Association has reported the mean daily coffee consumption for U.S. residents as 1.65 cups. Assume that a sample of 38 people from a North Carolina city consumed a mean of 1.84 cups of coffee per day
A course in computer graphics technology requires students to learn drawing concepts. This topic is traditionally taught using supplementary material.
A study is conducted to assess the impact of caffeine consumption, smoking, alcohol consumption, and physical activity on risk of cardiovascular disease.
It appears that the median height for sopranos is missing, but actually the median and the upper quartile are equal. How could that happen?
Management of Ebony, a leading manufacturer of bath soap, is trying to control its inventory costs. The weekly cost of holding one unit of soap in inventory.
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