The ages in years of 12 men were as follows :23,34,31,35,29,37,27,38,29,25,30,2 2. a) Calculate the mean and the standard deviation of the ages
b)Deduce their average and standard deviation in four years' time.

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20 points for the answer. this is for real , don't put random ! a rectangle has a length of 4 centimeters and a width of 7 centimeters. what is the effect on the perimeter when the dimensions are multiplied by 5? the perimeter is increased by a factor of 5. the perimeter is increased by a factor of 20. the perimeter is increased by a factor of 25. the perimeter is increased by a factor of 100.