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The President and CEO of Cliff Hanger International Airlines is concerned about high cholesterol levels of the pilots. In an attempt to improve the situation a sample of seven pilots is selected to take part in a special program, in which each pilot is given a special diet by the company physician. After six months each pilot's cholesterol level is checked again. At the 0.01 significance level, can we conclude that the program was effective in reducing cholesterol levels?
Pilot Before After1 255 2102 230 2253 290 2154 242 2155 300 2406 250 2357 215 190
For a continuous random variable x, the probability density function f(x) represents the probability at a given value of x. the area under the curve at x.
In an article in Accounting and Business Research, Carslaw and Kaplan investigate factors that in?uence "audit delay" for ?rms in New Zealand.
Quality Progress, February 2005, reports on the results achieved by Bank of America in improving customer satisfaction and customer loyalty by listening to the voice of the customer.
One bolt produced at this factory is randomly choosen and is found to be defective. what is the probability that it was produced by machine B?
Carry out a t-test to see if the mean healing rate is significantly lower in the experimental limbs, including all 12 newts. What are the test statistics and their P-values?
A sample of n = 5 scores has a mean of M = 12. If one person with a score of X = 8 is removed from the sample, what will be the value of the new mean?
At.05 level of significance can director conclude that there is difference in the number of circuit cards bought by month?
A t-distribution to create 90% confidence interval for population mean. If convenient, use technology to create the confidence interval.
Perform hypothesis testing on one variable's data.
Disney tells you that the average distance between the ears on a Mickey Mouse hat is 5 inches. In a sample of 100 Mickey Mouse hats you find that the average distance between the ears on the hats is 5.2 inches with a standard deviation of 1 inch.
When adding or subtracting expressions, how do you identify the like terms?
A consumer organization wants to know if there is a difference in the price of a particular toy at three different types of stores. The price of the toy was checked in a sample of five discount toy stores, five variety stores
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