During a 17 yearspan, there were 135 major hurricanes in a certain area. Assume that hurricanes are independent and the mean has not changed. Complete parts a through d below.

a) What is the mean number of major hurricanes peryear?

The mean number of major hurricanes per year is 7.94

(Round to two decimal places asneeded.)

b) What is the standard deviation of the annual frequency of majorhurricanes?

The standard deviation of the annual frequency of major hurricanes is _____

(Round to two decimal places asneeded.)

c) What is the probability of having a year with no majorhurricanes?

The probability of having a year with no major hurricanes is _______

(Round to four decimal places asneeded.)

d) What is the probability of going two years in a row without a majorhurricane?

The probability of going two years in a row without a major hurricane is _______

(Round to four decimal places asneeded.)