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Metro Real Estate Association is preparing a pamphlet that they feel might be of interest to prospective homebuyers in the Middletown and Brockton areas of the city. One item of interest is the number of years children remain in the same district for schooling. A sample of 40 households with school-aged children in Middletown was randomly selected. The mean length of time in the district was 7.6 years, with a standard deviation of 2.3 years.
A sample of 55 households in Brockton revealed the mean length of time in the district was 8.1 years, with a standard deviation of 2.9 years. At the .05 level of significance, can we conclude the Middletown students stayed in their districts less time than the Brockton students? Use the five-step hypothesis testing procedure.
Compare the means of two populations using 96% confidence interval:
Take a confidence interval for the difference in the average of renting between the first andthird hotel.
If the city manager knows the average salary nationally is $38,300, which test of significance should be used? Why?
At 0.05 level of significance, is there evidence of noteworthy difference in variation in sales among different aisle locations?
Determine the following probabilities: Events A and B are mutually exclusive events defined on common sample space.
Determine the shape of chi-square distribution?
Set-up/solve the problem graphically. (How many ceiling fans and how many floor fans should be made?)
With this important detail, are there any significant differences with LSD?
Recognize the given samples are independent samples or matched pairs.
In order not to violate the requirements necessary to use the chi-square distribution, each expected frequency in a goodness of fit test must be:
Make up a scatter diagram with 10 dots for each of the following situations:
She wants to be 90% confident and be accurate within 5% of the true proportion. Find out the minimum sample size necessary.
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