According to the Insurance Institute of America, a family of four spends between $400 and $3,800 per year on all types of insurance. Suppose the money spent is uniformly distributed between these amounts.
(a) What is the mean amount spent on insurance?
Mean
(b) What is the standard deviation of the amount spent? (Round your answer to 2 decimal places.)
Standard deviation
(c) If we select a family at random, what is the probability they spend less than $2,000 per year on insurance per year? (Round your answer to 4 decimal places.)
Probability
(d) What is the probability a family spends more than $3,000 per year? (Round your answer to 4 decimal places.)