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Interested in the difference between two sires Difference between two workers or machines How well one worker works with a given brand of machine How much better are the workers at one plant compared to another? How much "better" is line 1 of variety A compared to line 2 of variety C?
They hope to use a sample size such that, with probability 0.95, the error will not exceed 0.04. What sample size will ensure this, regardless of what sample proportion value occurs when they gather the sample?
Determine the probability that Mexican American male in the 20 -74 age range has serum cholesterol value greater than 240 mg/dl.
A bank manager has developed a new system to reduce the time customers spend waiting for teller service during peak hours. The manager hopes that the new system will reduce waiting times from the current 9 to 10 minutes to less than 6 minutes.
What is the Standard Deviation of the Probability Distribution that would list the number of students (from 0 to 84) and the probability of each.
Determine the values of mean M and standard deviation s for original sample?
Four students each received a raw score of 22 on a different test. Compute the z-score for the raw score value of 22 for each student, given information about the distributions of X values for each test.
Would it be reasonable to conclude that the population mean is 63 pounds?
With probabilities 0.8, 0.1, 0.08 and 0.02 respectively. A particular company offers a $500 deductible policy. If the company wishes its expected profit to be $100, what premium should it charge?
Assume from past information that it is known that the standard deviation of the population is 9 hours. What is the correct conclusion for this hypothesis test?
Based on the custom "rule-of-thumb" for estimating the standard deviation, if the range of prices for a product sold in Kansas City is between $99 and $349, an estimate of the standard deviation of the prices would be about:
Find the probability that a random sample of 4 male Siberian tigers will have a sample mean weight more than 450 lb.
Assumed that the standard deviation of the difference in the mean number of drinks is 6.7 drinks.
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