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A university has 1000 computers available for students to use. Each computer has a 250 gigabyte hard drive. The university wants to estimate the space occupied on the hard drives. A random sample of 100 computers showed a mean of 115 gigabytes used with a standard deviation of 20 gigabytes. What is the standard error of the mean?
A better case can be made that observation 13 (Los Arboles) is an outlier. Describe what this means in plain terms.
Bob gets tests grades of 86, 92, and 60 He gets an 90 on his final exam. Find the weighted mean if each tests counts for 20%, and the final exam counts for 40% of the final grade.
What is your null hypothesis? What is your alternative hypothesis? What your decision about the null hypothesis?
Find the probability that in a given year,a) Exactly one major hurricane will strike the U.S. mainland
What is a discrete and continuous random variable? What is an example of each variable? What are the similarities and differences between each variable?
According to the U.S. Bureau of the Census, 75% of adults regularly drank alcohol in 1985. An investigator predicts that fewer adults drink now than drank then.
Use MegaStat's output for multiple regression to determine the multiple regression equation
The starting salaries of individuals with an MBA degree are normally distributed with mean of $40,000 and standard deviation of $5,000. What percentage of MBA's will have starting salaries of $34,000 to $46,000?
In a multiple regression equation two independent variables are considered, and the sample size is 25. The regression coefficients and the standard errors are as follows.
Identify the indicated values or interpret the given display. In a survey of 703 randomly selected workers,
The fill amount of bottle of soft drink has been found normally distribute with a mean of 2.0 liters and a standard deviation of 0.05 liters. If a random sample of bottles is selected, what is the probability that the sample mean will be between 1..
Determine the upper control limit (UCL) and lower control limit (LCL) for an X-Bar chart if six samples of subgroup size 5 (n=5) were collected, and the mean of the sample averages is 4.7 and mean of the sample ranges is 0.35.
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