Normal random variable
Assume X is normal random variable with µ = 30 and s = 2. Determine the values of following probabilities. (Round your answers to four decimal places.)
(a) P(X < 32)
(b) P(X > 25)
(c) P(29 < X < 33)
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A survey found in a sample of 75 families, 26 owned dogs. A survey 15 years ago found in a sample of 60 families, 26 owned dogs. At ? = 0.05, has the proportion of the dog owners changed over the 15 year period?
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At ? = 0.01, is there enough evidence to support researcher's claim? A Probability plot and box plot showed that both variables are distributed normally as well as have no outliers.
Kendall is riding on the Ferris wheel. She observes that it takes 49 seconds to make the complete revolution. Her seat is 31 feet from axle of wheel. Use formula v=rw to determine the linear velocity in feet per second.
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