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The Gallup Poll has decided to increase the size of its random sample of Canadian voters from about 1500 people to 4000 people. The effect of this increase is:
a. increase the standard error of the estimateb. decrease the standard error of the estimatec. have no effect because the size of the population is still the samed. eliminate any bias in the sample
Show that theta~ = u(X) is an unbiased estimator of theta, where u(0) = 1 and u(x) = 0 if x =1,2, ... Compare the MSEs of theta(hat) and theta~ for estimating theta = e^(-m) when m=1 and m=2
The average amount of insulation in the sample of household is 12 inches. The sample standard deviation is 15 inches. Set up and interpret a 95% confidence interval.
Consider a gambler who at each play of the game has probability of winning one unit and probability of loosing one unit. Assuming that the successive plays of the game are independent,
Choose a new car or light truck at random and note its color. Here are the probabilities of the most popular colors for vehicles. Choose two vehicles at random. What is the probability that both are silver or both are white?
If the alpha level is changed from a = .05 to a = .01, (a) What happens to the boundaries for the critical regions? (b) What happens to the probability of a type I error?
What the information do z-scores give that actual heights do no?
A study regarding the relationship between age and the amount of pressure sales personnel feel in relation to their jobs revealed the following sample information.
Evaluate the performance of this decision.
Probability for simple and compound events.A certain bowler can bowl a strike 70% of the time. What is the probability that she.
What is the probability that all three lines experience a surface finish problem between 20 and 40 hours of operation? Why is the joint probability density function not needed to answer the previous questions?
Describe how a domestic fast food chain with plans for expanding into China would be able to use a forecasting model.
Determine the coefficient of determination for this regression problem and comment on its capability to predict outcome.
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