Suppose that the mean cranial capacity for men is

1170

cc

(cubic centimeters) and that the standard deviation is

200

cc

. Assuming that men's cranial capacities are normally distributed, complete the following statements.

(a) Approximately

95%

of men have cranial capacities between

cc

and

cc

. (b) Approximately ?68%75%95%99.7% of men have cranial capacities between

570

cc

and

1770

cc

.