48,778 ; 41,046 ; 29,083 ; 36, 394 ; 32,302 ; 42,787 ; 41,972 ; 37,229 ; 25,314 ; 31,920 ; 38,030 ; 38,445 ; 30, 750 ; 38,886 ; 36,770 ; 46,046
use five classes. is it reasonable to assume that the life spans are normally distributed?
I don't get what am I suppose to do?
Range is approximately 25,000 to 50,000. Divide that range into 5 intervals. Does that approximate a bell-shaped curve?
