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Ledolter and hogg report that two different fabrics say x and y are compared on the martindate were tester which can compare two materials in sigle run, weights losses from seven runs are as follows:
x= 36 26 31 38 28 37 22y= 39 27 35 42 31 39 21
Examine these data by creating the 90% confidence interval for difference of means. Define your assumption.
The appropriate use of multiple regression depends on being able to make four basic assumptions about the data being used to develop the regression model:
The New York City Housing and Vacancy Survey showed a total of 59,324 rent-controlled housing units and 236,263 rent-stabilized units built in 194 or later.
Many times researchers preselect the value of alpha of .01 or .001. What are the factors that allow selection of either of those levels of significance?
Use the traditional method to test the given hypothesis. Assume that the population is the normally distributed and that the sample has been randomly selected.
Automobile manufacturers are interested in the difference in reaction times for drivers reacting to traditional incadescent lights and to LED lights.
Consider a random sample of six families who are asked if their children have an influence on their vacation destination.
Use the above information to calculate the number of watches (units) and the sales dollars we need in order for our flea market business to break even for the day.
A hypothesis states a difference exists between two populations. Sometimes this is an obvious conclusion because the means will be very different.
The weight for a group of 18 month-0ld girls are normally distributed with a mean of 24.4 pounds and a standard deviation of 2.6 pounds. Use the table to find the percentage of 18 month-old girls who weigh more than 27.8 pounds.
Samples are shown of volatility (coefficient of variation) for sector stocks over a certain period of time.
Demonstrates clearly and fully the ability to use Excel to perform the correlation for the data set.
Supposing that there is no cost of entering the sweepstakes, find the expected value of the amount won for one entry. Determine the expected value if the cost of entering this sweepstakes is the cost of a postage stamp. Is it worth entering the cont..
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