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You are analyzing some two-variable data and compile the following relationship between variables x and y. Calculate the relationship coefficient for this data. X Y 20 16 18 12 24 18 20 17 22 21 14 10 8 9 4 6 7 3 5 8 18 10...
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The mean value of the amount of beverage injected into the bottles in a whiskey-bottling operation is known to be normally distributed with an average value of 750 milliliters (ml) and a standard deviation of 10 ml. What is the probability that you might randomly select a sample that lies between...
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From the meticulously compiled annual report on medical statistics in the U.S., a typical adult male has an average cholesterol reading of 242.2 mg/dL with a standard deviation of 45.4 mg/dL. If you randomly select 25 adult males what is the probability that the average cholesterol reading of...
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what is the difference between Hazard ratio and multivaraiate adjusted hazard ratio
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"The Lake Placid Town Council has decided to build a new community center to be used for conventions, concerts, and other public events, but considerable controversy surrounds the appropriate size. Many influential citizens want a large center that would be a showcase for the area,...
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For the given joint probability mass function f(x, y) = (x + y)/36 over the nine points with x = 1,2,3 and y = 1,2,3. Determine E(X) , E(Y) , V(X) , and V(X).
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Natalia can you help me with these questions. By the way, you have been so helpful.
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The number of newspapers sold daily at a kiosk is normally distributed with a mean of 300 and a standard deviation of 30. Calculate the probability that less than 250 newspapers are sold on a particular day.
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Compute a 90% confidence interval for the population mean, based on the sample 25, 27, 23, 24, 25, 24, and 59. Change the number from 59 to 24 and recalculate the confidence interval. Using the results, describe the effect of an outlier or extreme value on the confidence interval.
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refer to the baseball 2002 data which reports information on the 30 major league baseball teams for the 2002 season. set up a variable that divides the teams into two groups, those that had a winning season and those that did not. that is, create a variable to count the teams that wont 81 games...
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- 1. A school administrator wonders if students whose first language is not English score differently on the math portion of the sat exam than students whose first language is English. The mean SAT math score of students whose first language is english is 516 on the basis of data obtained from the college board. A simple random sample of 20 students whose first language is not English result in a sample mean SAT math score of 522. SAT math score are normally distributed with a population standard deviation of 114. Why is it necessary for SAT math scores to be normally distributed to test the hypothesis?
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