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A company executive has read with interest the finding that the average U.S. office worker receives about 60 e-mails per day. Assume that an executive, wishing to replicate this study within her own corporation, directs information technology personnel to find out the number of e-mails each of a sample of 100 office workers received yesterday, with the results as provided in the data file XR02019. Generate a frequency distribution and histogram describing this information and comment on the extent to which some workers appeared to be receiving an especially high or low number of e-mails. Source: emailstatcenter.com, June 20, 2009.
Clearly identify the independent and dependent variables you would study. Determine whether a one-tail or two-tail test is most appropriate and explain why. Generate a testable null statistical hypothesis and an alternative statistical hypothesis.
data packets are sent over a wireless network at a rate of 10 packets per second. what is the probability that exactly
the time taken for a sample of eight pieces of equipment to do a task has a mean of 52 minutes and a standard deviation
What is the expected duration of the game? Given the same CIC, how much more money should Alice have ititially so as to maximize the expected duration of the game?
Assume that the population is 0.55. Compute the standard error of the sample proportion for the following sample sizes:
Are all the events in this distribution mutually exclusive? Describe in detail.
How many 3-level Latin Squares are possible? {A "different" Latin Square in this case is one that does not have the same exact set of 9 treatment combinations as another set of 9.} Provide proof (or, at least "support") for your answer.
suppose a point xy is chosen at random from the disk x2 y2 lt 1. find a the marginal density of x and b the
use the following data to develop a multiple regression model to predict y from x1 and x2. discuss the output
A local tire dealer wants to predict the number of tires sold each month. He believes that the number of tires sold is a linear function of the amount of money invested in advertising.
he population consists of all 15 year olds living in the attendance district of a local high school. You plan to obtain a simple random sample of 200 such residents by using the roster of the high school as the sampling frame.
Given a normally distributed population, a sampling distribution is summarized by mean=50, n=100 and standard deviation=15. what is the probability that a simple random sample will reveal a sample mean
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