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When applying statistical tests involving comparing two means or a sample to a population mean, there are many organizational applications. For example, Human Resources may want to track entrance exam scores of their new hires. This would be an example of two mean comparison. In terms of the recent election, Gallup may take a sample and compare to a population of candidate votes (sample mean compared to a population mean).
Think of an example in your organization of either one of these tests and discuss its application as well as the risk of type 1 or 2 errors.
Suppose that we want to determine whether people who want to lose weight would lose more in three months by dieting or by exercising. Briefly describe how a randomized experiment would be done in this situation.
In the study of 15 taxi drivers, average experience was 11.2 years. Standard deviation was 2. At α = .10, is number of years' experience of taxi drivers really less than taxi company claimed?
A student conducted a study on the height and weight of adult males. She collected data from 40 adult males and found that average height is 68.34 inches with a standard deviation of 14.02 inches
a new muscle relaxant is available. researchers from the firm developing the relaxant have done studies that indicate
a sports league is making up their season schedule. the league has 12 teams with eight teams from la and the rest from
(a) Find the 95% confidence interval for the average monthly comprehensive car insurance premium paid by all owners of medium-sized cars. Interpret the result. (Use the z-table.) (b) Find the 90% confidence interval for the same problem. Interpret ..
Alisha buys 8 tickets in a raffle. 100 tickets are sold altogether. What is the probability that Aisha does not win the first prize
the following data were collected in an experiment designed to investigate the impact of different positions of the
A study was conducted to determine if there was a relationship between the prices a non-member of a club paid for various publications and the prices that a member paid for the same publications. The data gathered is shown below.
Show that the fractional error in Ti produced by an error in r, is very nearly 3.73 times the fractional error in rs, or dTi/Ti = 3.73 drs/rs.
Fresh fruit prices and quantity data for years 1988 to 2001 follow (Statistical Abstract of United States, 2002). Quantity data reflect per capita consumption in pounds and prices are per pound.
Kolzak Appliance has just received a shipment of 10 TV sets. Shortly after they were received, the manufacturer called to report that he had inadvertently shipped 3 defective sets.
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