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Question: SAT versus ACT Eleanor scores 680 on the SAT Mathematics test. The distribution of SAT scores is symmetric and single-peaked, with mean 500 and standard deviation 100. Gerald takes the American College Testing (ACT) Mathematics test and scores 27. ACT scores also follow a symmetric, single-peaked distribution-but with mean 18 and standard deviation 6. Find the standardized scores for both students. Assuming that both tests measure the same kind of ability, who has the higher score?
Looking at sample distribution from part b, find out how big treatment effect is. Specifically, determine the distance between sample mean and original population mean?
A corporation owns a factory that produces sulfuric acid. Because of changing conditions, the plant's output is quite variable. The company's president has observed that the output is normally distributed with a mean of 8,200 pieces per hour.
Consider the following frequency table of the performance ratings on a scale of 1-good, 2-fair, and 3-poor, bestowed on their local baseball team by a collection of 100 fans:
The U.S. Bureau of Labor Statistics releases figures on the number of full-time wage and salary workers with flexible schedules.
If there are 10 colleges he is? considering, how many different ways could he fill out the score report? form?
Their average age was 19.1 years with a standard deviation of 1.5 years. What is the 95% confidence interval for the population mean?
suppose that 80 of the accounts are in error. What is the probability that the auditor will find that the sample proportion (P) of the accounts in error will exceedd 0.10?
the associated press reported that in a survey of 4722 american youngsters aged 6 to 19 15 were seriously overweight a
Why did the Monarchy continue to support explorers who did not bring back large amounts of gold and spices?
(a) State the appropriate hypotheses in this case, defining any parameters you use. (b) Somehow the p-value did not get printed. Use the Vassar applet to compute the p-value. (c) Carefully state your conclusions based on these data. Use a level of si..
an insurance company is reviewing its current policy rates. when originally setting the rates they believed that the
A fair die is rolled nine times. What is the probability that an odd number (1,3 or 5) will occur less than 3 times?
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