Randomly sampling 196 items from a population where individuals have a normal distribution with a mean of 160 and a standard deviation of 280, find this probability to 4 decimal places. 80 100 120 140 160 180 200 220 240 x1=132.4 x2 = 1712 z=-4 z=-2 z=0 Prob(132.4<< 171.2)= + z=2

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