First of all we need to calculate mean anel Standard deviation. X: 235, 205 449 ! Ex = S27 9 X2: 55225,42025 20 1 Go I 1 Ex2= 1538 S67 mean(ãe) = 22 5279 %3D = 175.9667 30 sd = (153es67- 30-1 30 Sd = 144 At d=0.0s , Hhe coltical value df = 30-1 = 29, caitical value l=.04s when dt =n- CI = te x

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A:

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