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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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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