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Does a "follow-up reminder" increase the renewal rate on a magazine subscription? A magazine sent out 760 subscription renewal notices (without a reminder) and got 703 renewals. As an experiment, they sent out 240 subscription renewal notices (with a reminder) and got 228 renewals.
What is the mean and standard deviation of the number preferring the incumbent and what is the probability that more than 68% will favor the incumbent?
His estimated regression equation was Crime = 428 + .050 Income. Which outcomes would be likely in a bivariate regression on 45 randomly chosen U.S. cities in 2005 with
Consider the following two economic characteristics with two possible outcomes each: employment (increase, decrease) and economic trend (positive, negative).
It was reported that 20 readers responded and 87% said "no" while 13% said "yes." Recognize 4 major flaws in this survey.
A firm will promote two employees out of a group of six men and three women. list the chances of this experiment if there is particular concern about gender equity.
Suppose you are at a gas station filling your tank with gas. The function C(g) represents the cost C of filling up the gas tank with g gallons. Given the equation: C(g) = 3.03 (g)
What are differences between dependent and independent samples? Provide examples. What are the implications for determining the tests used to analyze data?
A student with a 3.5 to 4 grade point average who took standardized test is randomly selected. Determine the probability that students test score is less than 36.
It has been said that from the point of view of the general population, Type I errors are particularly undesirable. This has been used as a justification for setting alpha at such low levels as .05 and .01.
In a survey of women in a certain country (ages 20-29) the mean height was 64.5 inches with a standard deviation of 2.75 inches. What height represents the 90th percentile? What height represents the first quartile?
Twenty-five percent of the employees of a large company are minorities. A random sample of 7 employees is selected. What is the probability that the sample contains exactly 4 minorities?
A building developer has the opportunity to purchase several acres of land that is divided up into several lots for building single-family homes.
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