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Among the 300 employees of a company, 240 are union members, whereas the others are not. If 6 of the employees are chosen by lot to serve on a committee that administers the pension fund, find the probability that 4 of the 6 will be union members using
(a) the formula for the hypergeometric distribution;
(b) the binomial distribution as an approximation.
Create a hypothesis test which will investigate the variances. Label all steps for your test and show and label each step of the test procedure at a .1 level of significance.
a sump pump in a basement has two battery-operated back-up pumps. in the case of power outage the main sump pump shuts
box 1 contains 1000 bulbs of which 10 are defective. box 2 contains 2000 bulbs of which 5 are defective. two bulbs are
State the values of the coefficient of correlation and coefficient of determination correct to three decimal places
When testing two populations with small sample sizes, do both sample sizes have to be identical? Why or why not?
The cost of 5 gallons of ice cream has a variance 36 with a mean of 31 dollars during the summer. What is the probability that the sample mean would be less than 29.8 dollars if a sample of 39 5 gallon pails is randomly selected?
Use Excel and the data to test whether the mean alcohol expenditures for UCM students is equal to that of SBU students using a 1 % level of significance.
Suppose that the insurance company developed a new payment system in an effort to increase this percentage. A sample of 200 claims processed under this system revealed.
a. Calculate AOQ for p = .01, .02,..., .10. What does this suggest about the value of p for which AOQ is a maximum and the corresponding AOQL?
The article "Feeding Ecology of the Red-Eyed Vireo and Associated Foliage-Gleaning Birds" (Ecological Monographs, 1971: 129-152) presents the accompanying data on the variable X = the number of hops before the first flight and preceded by a fligh..
a researcher conducts an independent-measures study examining how the brain chemical serotonin is related to
manufacture of a certain component requires three different machining operations performed sequentially. machining time
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