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The weekly demand for a product is believed to be normally distributed. Compute the degrees of freedom. Use ?=0.10. The sample mean is 24.5 and the sample standard deviation is 3.
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a popular retail store knows that the purchase amounts by its customers is a random variable that follows a normal
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Pepsi wants to use this technique to determine if they should bid for an exclusivity agreement with NCSU. Such an agreement would bind NCSU to sell Pepsi soft drink products exclusively on campus.
In an ABCNews.com nationwide poll done in 2001, the proportion of respondents who thought that it should be illegal to use a hand held cell phone while driving a car was 69 %. The poll's sample was 1027.
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A coin is flipped 14 times. Use the normal approximation to the binomial distribution to calculate the probability of a total of 4,5, or 6 heads. Compare this to the binomial probability.
in the following problem check that it is appropriate to use the normal approximation to the binomial. then use the
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