February 22, 2017

Homework Help: statistics

Posted by cb on Sunday, November 14, 2010 at 10:05pm.

The number of accidents per week at a hazardous intersection varies with mean 2.2
and standard deviation 1.4.

a. What is the distribution of Xbar, the mean number of accidents in one year, (52
weeks)? {Note you do not have to use R for this question, write down the
distribution with parameters here and then proceed]
b. What is the probability that Xbar is less than 2?
c. What is the probability that Xbar is between 5 and 20?
d. What is the probability that there are fewer than 100 accidents in a year?

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