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A researcher has a series of Likert-scaled items and a measure of frequency of absenteeism. He uses each of the Likert-scaled items in a separate bivariate correlation with absenteeism without testing for the assumption of linear relationships. Is this ethical?
What is the probability that the shipment will be rejected? If the retailer inspects 6 of the CD shipment what is the probability that the shipment will be accepted?
Last school year, student body of a local university consisted of 30% freshmen, 24% sophomores, 26% juniors, and 20% seniors. A sample of 300 students taken from this year's student body showed the following number of students in each classificati..
A manufacturer of car batteries claims that his batteries will last, on average, 3 years with a variance of 1 year. If 5 of these batteries have lifetimes of 1.9, 2.4, 3.0, 3.5, and 4.2 years
A company that manufactures computer chips wants to use a multiple regression model to study the effect that 4 different variables have on y, the total daily production cost (in thousands of dollars).
A mean given by mu=143 lb and a standard deviation given by sigma=29 lb. If 1 woman is randomly selected, find the probability that her weight is below 113
The probability is 1 in 4,000,000 that a single auto trip in the United States will result in a fatality. Over a lifetime, an average U.S. driver takes 50,000 trips. (a) What is the probability of a fatal accident over a lifetime? Describe your re..
The typical homeowner has a utility function equal to the square root of wealth. Will the homeowner retrofit the house, and if so, which insurance policy will the homeowner buy?
The network is said to be robust if at least one of the three servers operate more than 2 years. What is the probability that the network is robust?
The U.S. Bureau of Prisons publishes data in Statistics Report on the times served by prisoners released from federal institutions for the first time.
Compute the minimum sample size required assuming that no prior information is avaiable?
The percentages of cones sales for chocolate, strawberry, and vanilla, are 75%, 60%, and 40%, respectively. For a randomly selected sale, define the following events:
At a large university, a mathematics placement exam is administered to all students. Samples of 36 male and 30 females are randomly selected from this year's student body and the following scores recorded.
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