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A large department store has 500 employees. There are 350 females and 200 of them are under the age of 25. There are 75 males under the age of 25. If an employee is selected for promotion, find the probability that the employee will be under 25 or a female.Express your answer as a fraction in lowest terms.
telephone calls enter a switchboard at a rate of 3 calls per minute. assume that any given no more than one call will
Using the empirical rule what percentage of adults is 25 - 45 has iq score bet 70 and 130.
Inspect table produced in question 2 above. Comment on relative sensitivity of minimum sample size to actual proportion and to desired half width.
The test grades at a large school have an approximately normal distribution with a mean of 50. What is the standard deviation of the data so that 80% of the students are within 12 points (above or below) the mean?
1. a study of commuting times reports the travel times to work of a random sample of 18 employed adults in new york
Find the equation of the regression line for the given data. What is the predicted value of Y when X = -2? What is the predicted value of Y when X = 4?
The regional tupperware dealers earned these commissions last month: what was the mean commision earned? round your answers to the nearest cents.
What is the value of the population mean? What is the best estimate of this value?
Set-up/solve the problem graphically. (How many ceiling fans and how many floor fans should be made?)
Find a 98% confidence interval for the mean number of days required for successful completion of physical therapy for patients in the average group. Discuss the results.
Assume the body temperatures of healthy adults are normally distributed with a mean of 98.20°F and a standard deviation of 0.62°F (based on data from the University of Maryland researchers).
a print shop has three critical machines that essentially deter-mine the productivity of the shop. they are each
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