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A student must choose one of the subjects, art, geology, or psychology, as an elective. She is equally likely to choose art or psychology and twice as likely to choose geology. What are the respective probabilities that she chooses art, geology, and psychology?
An aptitude test has a mean of 220 and standard deviation of 10. find the corresponding z score for:
Use suitable one or two sided test for null hypothesis of no difference in them then changes rating between groups at 0.10 significance level.
At alpha = 0.05, is there enough evidence to conclude that proportions vary from those in the study?
Tom Sevits is the owner of the Appliance Patch. Recently Tom observed a difference in the dollar value of sales between the men and women he employs as sales associates.
From the given probability distribution finite the mean and standard deviation.
How many subsets of S contain either the number 6 or the number 15?
The dean of students believes that teh costs are greater this semester. What is the test value for this hypothesis?
The estimated simple linear regression equation minimizes the sum of the squared deviations between each value of Y and the line.
In what sense is this business problem? A societal problem? An individual problem?
Calculate separately for 1983 and 1987, the 95% confidence interval for the proportion of students who had driven an automobile while drinking.
There were 3 defectives in the first batch and 5 in the second. Find a 95% confidence interval for the difference in the proportion of defectives.
Determine the probability that none of the calculators will be defective?
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