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Suppose that the standard deviation of the tube life for a particular brand of TV picture tube is known to be s = 500, but that the mean operating life is not known. Overall, the operating life of the tubes is assumed to be approximately normally distributed. For a sample of n = 15, the mean operating life is X = 8,900 hr. Determine (a) the 95 percent and (b) the 90 percent confidence intervals for estimating the population mean.
Find the formulas for computing the check digits for the international standard book number(ISBN),for both ISBN-10 and ISBN-13.Hence find the check digit for the book with ISBN '0-8176-4227'
Find the volume V obtained by rotating the region bounded by the given curves about the specified axis.
According to this model, in what year will there first be more than 5000 heart transplants performed in the U.S? Explain in one or two sentences what the slope means in the context of this problem.
Shopping at Savers Mart, Lisa buys her children four shirts and three pairs of pants for $85.50. She returns the next day and buys three shirts and five pairs of pants for $115.00. What is the price of each shirt and each pair of pants?
You and six friends play a game where each person writes down his or her name on a scrap of paper, and the names are randomly distributed back to each person. Find the probability that everyone gets back his or her own name.
Quantitative tools & techniques are basically important for improving the qualit of managerial decisions.examine the statement & discuss the role of quantittative techniques in planning & control of business activity.
this fall the sports team were trying to raise some money for their new uniforms.they decide to sell day lillies.
Which asset would the risk-averse financial manger prefer?
What is the greatest number of circular disks, each with a radius of 5.2 cm, that can be printed on a 1-meter square board?
This force can be written as the sum of a vector parallel to the displacement, plus a vector orthonal to the displacement. Give the vector component of the force that acts orthogonal to the displacement.
How many revolutions will a car wheel of diameter 32 inches make as the car travels a distance of eight miles? (Round your answer to the nearest whole number.)
you are a manager of a fast food restaurant. the population mean waiting time to place an order is 4.5 minutes with a
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