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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
Given the following values 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 and x and y form a linear equation in one variable, a equation in two variables, a quadratic equation a polynomial of three terms
Recognize strategies that were utilized to control for nuisance variables and minimize threats to valid inference making.
At the .01 significance level, can the manufacturer conclude that the price reduction resulted in an increase in sales?
Leading product are falling leading to declining revenues. Draft a research proposal for the client based on a scientific methodology.
If μ represents the mean increase in the verbal SAT score if all high school students used the method, the alternative hypothesis the teacher wishes to test is what?
The average for 14 cross-country runners is 172 mg/dl with a standard deviation of 41 mg/dl. Solve using the Traditional Method. Find the p-value for your test statistic. Use an α = 0.05.
A soft drink machine outputs a mean of 24 ounces per cup. the machines output is normally distributed with a standard deviation of 2 ounces. what is the probability of filling a cup between 21 and 26 ounces.
A college believes that 28% of applicants to that school have parents who have remarried. How large a sample is needed to estimate the true proportion of students who have parents who have remarried to within 5 percentage points with 95% confidenc..
Is the number of children that a college student currently has independent of the type of college or university being attended?
Using data from Boston, Massachusetts, a test of independence is run on the claim that ice cream sales per month and the number of car wrecks per month are independent. The claim is rejected.
Compute the value of z and state your decision regarding the null hypothesis.
Explain in your own words how to recognize a situation where you needed to use a two-sample test. Give a unique example of a two sample test for proportion or mean. Make sure to detail why only a two sample test would suffice.
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