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Please I want the final answer quickly QUESTION 4 Manama cement factory produces precast cement blocks, last year's record showed the mean weight per block

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QUESTION 4 Manama cement factory produces precast cement blocks, last year's record showed the mean weight per block as 20.21 KG This year they have sampled 50 units, and the maximum acceptable weight per block was 28.17 with a variance of 10 13 KG Calculate the z value associated with this sample? (Write your answer in 2 decimals places e.9.0.99)

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