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4. Suppose a factory produces both batches of hammers and screwdrivers. The company produces hammers in batches of 15 and scr
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No. of hasmess (m) = 15 NO. Of scoew driveof (um) = 10 Total items (N) = 1540=25 consider sample of taken without geplacementb) mean of x , E(N = nm = 10x15 . 257. c) vaorance of X PLOT : V(X) = nman-m (anj : ? (N-1) = 10X15X10X15. 25.(25-1)

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