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Scores on a standardized test are normally distributed with a mean of 100 and a standard deviation of 12. An individuals test score is found to be 125. Find the z-score corresponding to this value.
Use the Kaplan-Meier approach to estimate the survival function.
A basketball player has a history of making 75% of the foul shots taken during games. The player gets two shots at the foul line.
What is the probability that the average time spent per customer will be at least 3 minutes?
suppose a manufacturing company makes a certain item. the time to produce each item is normally distributed around a
In random samples of 25 from each of two normal populations, we found the following statistics: Estimate the difference between the two populations means with 95% confidence.
A social psychologist reports that "in our sample, ethnocentrism was significantly higher (P
two different sprays for rewaterproofing parkas are compared by treating 5 parkas with spray 1 and 6 with spray 2.
What is the expected value of the sampling distribution model for the proportion of 480 freshmen that will return to the same school for their sophomore year?
Where is the flaw and how can it be fixed? If R^2 is taken as a model for the Euclidean plane, does this help resolve the difficulty? Explain.
Rhe frequency distribution summarizes a sample of times (in minutes) between eruptions of a cretain geyser. Find the approximate population mean and approximate population standard deviation of the data.
question suppose that the price of stock a is aed 25 and its standard deviation is 5. the average market price for all
Use the significance level of alpha = .05 to test claim that p > .5. Sample is simple random sample n = 50. Illustrate how to compute beta for test and suppose true population proportion is .6.
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