What percantage of cracks are over given length
Suppose cracks exist in a certain material, and the crack length [in micrometers (µm)] of a randomly selected crack is normally distributed with an average length of 71 and a variance of 6.25. (a) What percantage of cracks are over 74 µm long?
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the crack length [in micrometers (µm)] of a randomly selected crack is normally distributed with an average length of 71 and a variance of 6.25. (a) What percantage of cracks are over 74 µm long?
Three cards are randomly selected, without replacement, from a standard deck of 52 playing cards. Compute the conditional probability that the first card selected is a club given that the second and third cards are both clubs.
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A standard deck of 52 cards is thoroughly shuffled and cut. What is the chance of turning up either an Ace or a Heart?
A random sample of size 20 is taken, resulting in a sample mean of 16.45 and a sample standard deviation of 3.59. Assume x is normally distributed and use this information and α = .05 to test the following hypotheses.
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