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A poll used a survey of 1008 people to learn about how people feel about economy. Responses were asfollows:
595 people Economy is growing332 people Economy is staying about the same81 people Economy is shrinking
(a) Construct a distribution to represent the population such that the survey result above may be seen as a sample from the population.(b) Find the MLE for the parameters in the population.(c) Derive the explicit formulas for the MSE of the estimators.
A regression equation was computed to be Y'=35+ 6X. The value of the 35 indicates that
Suppose we wish to estimate the population mean using a confidence interval. When is it appropriate to use a z-score? When is it appropriate to use a t-score?
How do you verify that the assumption of a normal distribution is correct if you've only the mean and standard deviation?
A standard deviation of 12. If the data for both tests are normally distributed, on which test did the student score better relative to the other students in each class?
There are 130 cabinets in a row in a warehouse. The first worker to arrive opens the door of every cabinet. The next employee visits every other door and closes it.
In order for the blood glucose level of a diabetic to be in the lower 20 percent of all diabetics, that person's blood level must be less than what value?
Psychologists wanted to test whether a certain accelerated class' IQ was different than average. There were 25 students in the class; their mean IQ score was 108.
Calculate the Pearson correlation for these data also determine whether there is a significant correlation among attitudes for husbands also wives.
Calculate the profit earned/loss incurred on; a high performance tire that exceeds 40,000 miles, a high performance tire that does not exceed 40,000 miles.
People with type O-negative blood are universal donors. That is, any patient can receive a transfusion of O-negative blood. Only 7% of the American population have O-negative blood.
Would the method described above be a good way to determine which team was taller (explain why or why not)?
Construct a 99% confidence interval estimate of the population mean amount of paint in a 1-gallon can.
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