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A sample of 25 different payroll departments found that the employees worked an average of 310.3 days a year with a standard deviation of 23.8 days. What is the 90% confidence interval for the average days worked by employees in all payroll departments?
the data represent the number of driving fatalitites for a certain area by age for male and female drivers.
specifically 68 of gen y people have a say in computer purchases. suppose you select a sample of 100 gen y
Your company ships a lot of packages needing quick delivery and short notice. In the past, you have used Speedy Air Delivery Service, but you are beginning to receive complaints from customers who say they are not receiving their packages on time.
The floor plan of a house is rectangular. The house's length is 2x-10 and its width is x+3. Write an expression for the area of the house
for a population with micro 40 and s 7 find the -score for each of the following x values. note you probably will need
A recent study indicated that 29% of the 100 women over age 55 in the study were widows. If no estimate of the sample proportion is available how large should the sample be?
Determine whether families with income of $40,000 will have to spend less than $6,500 to send their children to prestigious colleges. (Use α = 0.05.)
Determine the least squares line and forecast Y for an average weekly temperature of 63 - Is this a realistic value for the population mean of the client's account? Explain.
Does the evidence suggest that postpartum women do not get enough sleep? Use =0.05 level of significance. How is the problem set up using the classical and P-value approach.
Please state the steps used to perform a hypothesis test on the coefficient of correlation and provide a detailed example. Details are greatly appreciated!
while writing an article on the high cost of college education a reporter took a random sample of the cost of new
If you have a statistical package that computes binomial probabilities, find the probability that at least five funds outperform the market in all 10 years.
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