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Jill constructs a test to measure a personality state. The test consists of multiple items which sum up to indicate the degree of the trait that is present. It is important to note that Jill is measuring a state that is quite variable. Which measure of reliability would be LEAST appropriate for assessing the adequacy of her test?
A. Split half
B. Test-retest
C. Cronbach Alpha
D. Kuder-Richardson 20
Determine and plot the probability mass function and probability distribution function of the contract award amount (in millions of dollars).
According to TNS Intersearch, 69% of wireless web users use it primarily for receiving and sending e-mail. Suppose that three wireless web users are selected at random. What is the probability that all of them use it primarily for e-mail?
How many cans of paint should the sample contain if the researcher wants to be 98% certain of being within one percentage point of the true proportion of this chemical?
A game company that manufactures a dart game that dispenses tickets has been asked to put a business plan together for a customer who wishes to buy the game.
A GSS asked. "What do you think is the ideal number of children for a family to have? the 497 female who responded had a median of 2, mean of 3.02 and standard deviation of 1.81 (a) Report the point estimate of the population mean.
A frequency polygon: does not depend on one variable. True-False
Compute mean absolute percentage error (MAPE) of the forecasts.
Determine the mean for list of numbers. 6, 5, 9, 4, 14, 9 (Round to the nearest tenth)
A business journal investigation of the performance and timing of corporate acquisitions discovered that in a random sample of 2,863 firms, 848 announced one or more acquisitions during the year 2000.
Find the mean and standard deviation for the number of left-handed students in such classes of 25 students.
Two components of reliability 0.95 are in parallel and this subsystem is connected in series to a component with a reliability of 0.90. Calculate the overall reliability of this system.
Solve this problem explicitly using all five steps of hypothesis testing, and illustrate your answer with a sketch showing the comparison distribution
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