sir i am stuck for this questions

(C) p. Z 455 children taking the nutritional supplement L-Arginine grew, over a certain period of time, an average of 4.1 in., with a standard deviation of 1.2 in. 69 children not taking the supplement grew, over the same period of time, an average of 3.6 in., with a standard deviation of .9 in. To a 1% level of significance, can it be asserted that (in general) children taking the supplement grow more than children who don't