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A study was conducted in 1980 that found that New York had the slowest highway drivers...

A study was conducted in 1980 that found that New York had the slowest highway drivers in the country. The drivers traveled at an average speed of 52.7 mph. Assume the population standard deviation is 6 mph. What is the probability that a sample of 45 of the drivers will have a sample mean less than 51 mph?

a) what is the standard error of the Sampling distribution?

b) what is the probability that a sample of 45 of the drivers will have a sample mean less than 51 mph?

please answer all parts of the question our thumbs up for a correct answer in a timely response

thanks
math   Statistics-And-Probability   
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