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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.
Before deciding, the decision maker considers listening to the weather forecast on the radio. Draw an influence diagram that takes into account the weather forecast.
1.a statistics instructor wants to know which route will get her to school the fastest. each day from october 2 to
rob and steve are having an archery contest the goal is to shoot an arrow closest to the center of a target the bulls
using the solution from problem 5 and given the list of crash times and costs determine the new diagram and
On basis of these data, can college conclude that students in new program performed significantly better than rest of freshman class? Use a one-tailed test with α = .05.
BMI in children is approximately normally distributed with a mean of 24.5 and a standard deviation of 6.2. A BMI between 25 and 30 is considered overweight. What proportions of children are overweight?
The shelf and purchases it, and he later discovers that the lamp he purchased is defective. What is the probability that the defect came with the first shipment?
in a survey of families in which both parents work one of the questions asked was have you refused a job promotion or
it is claimed that in a bushel of peaches less than ten percent are defective. a sample of 400 peaches is examined and
Set up the following null and alternative hypotheses for both factors and their interaction. You should have three verbal statements, not symbolized statements.
In the past an autoobile repair shop owner has noticed that sales increased ats certain economic indicators decreased. Calculate the expected sales increase and the standard deviation.
Suppose the following data represent thickness between and within silicon wafers (in microns), with a target value of 14.5 microns.
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