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Scores on a certain test are normally distributed with a variance of 91. A researcher wishes to estimate the mean score achieved by all adults on the test. Find the sample size needed to assure with 95.44 percent confidence that the sample mean will not differ from the population mean by more than 2 units.
A manufacturer finds that the total profit from producing and selling Q units of a product is given by the profit function:
Calculating the probability from a given ball situation. Six red balls and four blue balls are placed on a container. The probability that the first ball drawn
John steps on an escalator to leave a subway. Then, 5 seconds later, Jane steps on a parallel escalator to enter the subway. They pass 14 seconds after that. If both escalators are travelling at a speed of 5 feet per second, what is the length of ..
Describe how a domestic fast food chain like McDonald's with plans for expanding into China would be able to use a forecasting model.
The Decision Sciences department head at a university will be scheduling faculty to teach courses during the coming fall semester.
A total of 255 tickets were sold for the school play. They were either adult tickets or student tickets. the number of student tickets sold was two times the number of adult tickets sold. How many adult tickets were sold?
Use Lagrange multipliers to find the given extremum. In each case assume that x and y are positive.
Suppose G is a finite group with the property that every non-identity element has prime order (D3 and D5 are examples of groups with this property).
in 1990, 1 dollar equalled 125 yen. In 2010, 1 dollar equalled 80 yen. At this rate, how many yen will the dollar equal in 2015?
Probability: Problems and Solutions, How many ways are there of drawing a red, a black, and a green ball from a bucket with 2-Red, 2-Black, and 5-Green balls?
Make a new variable called BMIDIFF by computing the BMI difference for each twin pair.
Suppose a drainage pipe slopes downward 4 inches for each 11 foot horizontal stretch. What is the slope of the pipe? (Round your answer to two decimal places.)
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