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An instructor has a test bank consisting of 300 easy true-false questions, 200 difficult true-false questions, 500 easy multiple choice questions and 400 difficult multiple choice questions.
If a question is selected at random from the test bank, what is the probability that it will be:
a) An easy question
b) An easy multiple choice question
c) An easy question, given that it is a multiple choice question
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
Calculate the coefficient of determination, given that the linear correlation coefficient, r, is -0.625. What does this tell you about the explained variation and the unexplained variation of the data about the regression line?
Enter relative proportions of the 3 samples in order (20,50,30) in "Expected values" area.
Arbitrarily choose someone from sample. Determine the probability that they are Jewish and Democrat?
Following data from an x bar chart, is the process capable (capability index>1.33)?
You want to show an increase in buying and selling of single-family homes this year when compared with last year's rate.
Describe a business-related situation in which you would expect there to be a strong relationship (correlation) between an independent and dependent variable.
The mean weight of newborn babies in a Long Island Community is 7.5 lbs with a standard deviation of 1.4 lbs. What is the probability that a random sample of 49 babies has a sample mean weight of at least 7.2lbs?
Statewide real estate sales agency, Farm Associates, specializes in selling farm property in state of Nebraska. At.10 significance level, has there been an increase in selling time?
Harrington Health Food stocks 5 loaves of Neutro-Bread. The probability distribution for sales of Neutro-Bread is listed in following table. How many loaves will Harrington sell on average?
The following frequency table summarizes the ages of 100 shoppers at the local grocery store. Compute the sample variance and standard deviation for this data set. Please show your work in Excel.
He argues that the regression effort says people who perform very poorly in their previous job tend to perform well in their next job. Is this what the regression effect says? Explain.
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