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The time it takes for customers at a Lawrence, Kansas store to check out is normally...

The time it takes for customers at a Lawrence, Kansas store to check out is normally distributed with a mean of 10.2 minutes and a standard deviation of 1.8 minutes. Let the random variable X measure the time it takes for a randomly selected customer at the Lawerence, Kansas store to check out

A) State the distribution of the random variable defined above

B) Compute the probability that a randomly selected customer at the Lawrence, Kansas store will wait less than 7 minutes to check out

C) Compute the probability that a randomly selected customer at the Lawrence, Kansas store will wait between 8 and 9 minutes to check out

D) Compute the probability that a randomly selected customer at the Lawrence, Kansas store will wait longer than 12 minutes to check out

E) Compute and interpret P80

Math   Statistics-And-Probability   
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