Mathematics, 18.04.2020 01:21 daigle18383
Suppose that the standard deviation of the tube life for a particular brand of TV picture tube is known to be σ = 500, but 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 = 8900 hours. Construct (a) the 95 percent and (b) the 90 percent confidence intervals for estimating the population mean.
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Ben wants to play a carnival game that costs $2. in his pocket he has 5 red tickets worth 35 cents each, and 15 blue tickets worth 10 cents each. which of the following systems of inequalities correctly represents the constraints on the variables in this problem? let represent the red tickets and b represent the blue tickets.
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Suppose that the standard deviation of the tube life for a particular brand of TV picture tube is kn...
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