STATISTICS AND METHODOLOGY QUESTION NO 16

0. The mean wage of a certain group of workers is 500 rupees and a is 100. Find what percentage of workers get above 375 rupees

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Option : B
Explanation : Z = (X - μ)/σ = (375 – 500)/100 = 1.25 The area according to the table is 0.3944. The total area will be = 0.5 + 0.3944 = 0.8944 or 0.8944 x 100 = 89.44%

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