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The amount of time that a custome spends waiting at an airport check-in counter is a random variable with mean 8.3 minutes and a standard deviation 1.5 minutes. Suppose that a random of n=49 customers is observed. Find the probability that the average time waiting in line for these customers in
a. Less than 10 minutes
b. Between 5 and 10 minutes.
Internet is 13.4 hours per week, with the sample standard deviation of 6.8 hours. Determine the 95 percent confidence interval for mean time Wired subscribers spend on Internet.
The following two variables: x = the number of police patrol cars cruising in a given neighborhood, and y = the number of burglaries committed in the neighborhood?
Calculating the effectiveness of an educational intervention using a pretest-posttest design. I plan to run an ANCOVA on the scores with the pretest as the covariate. The six subcatagories on the test give the raw score of correct answers out of the ..
Briefly discuss probability distributions. What is a normal distribution? Please provide a written example of how 'understanding distribution' can be an asset for any business project.
the u.s. department of transportation reported that during november 83.4 of southwest airlines flights 75.1 of us
Compare the mean for the heights of males and the mean of the heights of females in the following data. Compare the values and explain what can be concluded based on the numbers.
1. the labor relations manager of a large corporation wished to study the absenteeism among workers at the companys
A shipment of 250 netbooks contains 3 defective units. Determine how many ways a vending maching company can buy three of these units and receive a) no defective units b) all defective units c) at least one good unit.
a researcher wants to determine a 97 confidence interval for the mean number of hours that uiuc students spend doing
the information on seat belt usage by gender shown below. the proportions in the following table are based on a survey
The mean and standard deviation for the quality point averages of a random sample of 36 college seniors are calculated to be 2.6 and 0.3
The standard deviation of the sample was 6 people. Develop a 95 percent confidence interval for the population mean.
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