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A marketing firm asked a random set of married and single men as to how much they were willing to spend for a vacation. At alpha= .05, is a difference in the two amounts?
Married men - sample size=40, mean spending= 420, Sample varience= 4000
Single men - sample size=70, mean spending=425, sample varience= 7000
Explain your answer
Women in the U.S. Air Force have hands that are 6.9 inches on the average (from the tip of the middle finger to the heel of the hand). The standard deviation is 0.34 inches. Assume that hand length is normally distributed.
jupiter media used a survey to determine how people use their free time. watching television was the most popular
Which represent errors of estimation for individual points, an alternative way to examine the error of the regression model using a single measurement is to determine the sum of all the residuals.
a bureau of national affairs survey found that 79 of employers provide their workers a two-day paid thanksgiving
significance testing. t-tests1. in the course of the thesis work a student develops a new approach for the solution of
construct a 96 confidence interval for the true mean breaking strength of a certain type of 10 ft. long cables. assume
the weights of envelopes sent from an insurance office are normally distributed with mean 12 ounces and standard
fitting of simple linear equation.a suburban drug store manager thinks that its daily sales are related to the number
The quality-control inspector of a production plant will reject a batch of syringes if two or more defective syringes are found in a random sample of eight syringes taken from the batch. Assume the batch contains 1% defective syringes.
fortune magazine publishes an annual issue containing information on fortune 500 companies. the following data show
Of these, 36 are seniors, 30 are chemistry majors, and 8 are neither. A student is selected at random from the class. What is the probability that the student is both a senior and a chemistry major?
a hypothesis test for a population proportion p is given below ho p 0.25 vs. ha p ne 0.25 ne means not equal for
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