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Sixty percent of the employees in a certain department are female. One third of the females drive foreign cars. The rest drive domestic cars. Twenty-five percent of the males in the department drive foreign cars. One person is randomly selected from the departmental files. Use this information to construct a probability table, and then calculate each of the following probabilities:
Are the events female and foreign car owners independent? Why or why not?
Confirm that these statements are accurate by finding the geometric mean rate of increase.
In a regression model involving 30 observations, the following estimated regression equation was obtained:
The probability of obtaining a random sample mean, which is lower than the population mean, is:
Is there evidence of a significant difference in the proportion who get their news primarily from newspapers between those 36 to 50 years old and those above 50 years old? (use α = 0.05)
Find the probability of exactly 6 Mexican-Americans among 12 jurors.
Does this sample indicate a smaller average? Use α = 0.05 and assume a normally distributed population.
Compute mean and standard deviation for sample of N = 8 females and sample of N = 8 for males.
Suppose population standard deviation for those drinking regular coffee is 1.20 cups per day and 1.36 cups per day for those drinking decaffeinated coffee.
Establish an approximate design to MTBF required for a system that will result in an approximate minimum total cost over a five year period if the system is to be operated 7500 hours per year
How many jackets should the store owner order if she wants to maximize her expected profit?
Construct appropriate control charts for before and after introduction of the new pathway. Discuss process stability and the results.
Determine her weighted mean grade? What letter grade did she earn? (A, B, C, D or F).
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