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A multiple regression equation is y = -8.5 + 0.964a + 8.104b, where ‘a' is a person's age, ‘b' is the person's body fat percentage, and ‘y' is the person's lean mass percentage. Predict the lean mass for a person who is 27 years old and has a body fat percentage of 4.5%.
A software company wants to determine whether there is a relationship between their three sales offices and the sales of their software products. The actual sales results are
Construct a 96 percent confidence interval for the mean weight of all firefighters six months after the exercise rooms were installed.
Draw the suitable 2x2 table, compute and interpret suitable measure of association.
Findout the probability using normal approximation for the provided values. Findout the specified probability from a table of Normal probabilities.
Type the above data into the SPSS Data Editor window, or save this file as an unformatted text file and write SPSS syntax to read it in.
The manufacturer of the X-15 steel-belted radial truck tire claims that the mean mileage the tire can be driven before the tread wears out is 60,000 miles.
Verify that this is valid density function. Find out probability that weight is smaller than 24 ounces.
A sample of waterfall heights in Hawaii show that the average height is 261.5 feet with a standard deviation of 13.76 feet.
How many boxes must the processor sample to be 95 percent confident that the sample mean does not differ from the population mean by more than 0.2 pounds?
Compute the standard error of the mean O(funny o with line) line over x, for sample sizes of 50, 100, 15o, and 200. What can you say about the size of the standard error of the mean as the sample size is increased?
A newspaper ad for a manager trainee position contained the statement "Our manager trainees have a first-year earnings average of $20,000 to $24,000." Do you think that the ad is describing a confidence interval? Explain your answer.
Assuming this is literally true, how can it be explained? What facts / statistics would you need to know to expose this misleading claim?
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