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A sample of 35 different payroll departments found that employees worked an average of 240.6 days a year. If the population standard deviation is 18.8 days, find the 90% confidence interval for the average number of days worked by all employees who are paid through payroll departments.
what is an interaction? describe an example and identify the variables within your population work social academic etc.
Mean SAT score is computed for each sample. If the sample size is n=2,500, find the mean and standard deviation of the distribution of sample means.
morens department store has a special sale whereby each customer upon checkout chooses a random ticket that is labeled
Write the regression equation for the above information. Interpret the meaning of the coefficients of X1, X2 and X3. Compute the coefficient of determination and interpret its meaning
Obtain a 95% con?dence interval for home price. Do parametric or nonparametric methods seem more appropriate for the data? Obtain a scatterplot between the square-foot area of a home and its price.
A market researcher wants to find the 99% Confidence Interval for the average number of hours people spend online each day.
a new simple test has been developed to detect a particular type of cancer. each of the 2000 adults and finds by other
to evaluate a particular metlar scale an item whose weight is known to be 16.01 ounces is weighted five times by the
let x be a continuous random variable whose probability density function isfxx3 4for an interval 0 lt x lt c.what is
twenty students agreed to participate in a new type of learning program to increase their typing efficiency. it was
A confidence interval estimate for the population mean is given to be (35.55, 44.12). If the standard deviation is 15.797 and the sample size is 37, answer each of the following: (A) Determine the maximum error of the estimate, E.
Which kind of t-test should be used? Calculate the two-tailed t and p values using this t-test.
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