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A normal population has a mean of 75 and a standard deviation of 5. You select a sample of 40. Compute the probability the sample mean is:
a. Less than 74.
b. Between 74 and 76.
c. Between 76 and 77.
d. Greater than 77.
Using any present or past job related data, perform an ANOVA in either Excel or MegaStat. Write your null and alternate hypothesis. Post your ANOVA table. Interpret the results.
Use the binomial distribution in the Data Analysis add - in to simulate the distribution of men and women among the next ten arrivals at an emergency room, assuming that, on average, six people out of ten who arrive are men.
Clark Heter is an industrial engineer at Lyons Products. He would like to conclude whether there are more units produced on the afternoon shift than on the day shift. A sample of 54 day-shift workers showed that the mean number of units produced w..
The average monthly cost per household for groceries in kentucky is $625/mo with a standard deviation of $125/mo. The average age of the memebers in each of the households in Kentucky is 22.5 yr with a standard deviation of 5.175 yr. Which data se..
Create one table that calculates summary measures of the change in test scores and income variables across all 80 schools.
For each lettered part, a through c, examine the two given sets of numbers. Without doing any calculations, decide which set has the larger standard deviation and explain why. Then check by finding the standard deviation by hand .
Standard error for regression equation - determination and non determination and explain the meaning of each.
When comparing data from different distributions, what is the benefit of transforming data from these distributions to conform to the standard distribution?
An independent testing services road-tested 36 of the automobiles.
I did a study correlating net profit per location with expenditures on an in-house promotion, and got a correlation of about .15, and that was received very well.
The ANOVA summary table below is the result of a regression of sales on year of sales. Is the relationship statistically significant at .05? Comment.
In each of the following situations, the sampling frame does not match the population, resulting in undercoverage. Give examples of population members that might have been omitted:
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