Question

The lengths of plate glass parts are measured to the nearest 1/10 mm. The lengths are discretely and uniformly distributed with values at every 1/10th mm, starting at 590.0 thru 590.9 mm. Determine the mean & variance of lengths.

Answer 1

For uniform, the mean is:

x¯ = (590.0+590.9) 2
The variance is:
σ = sqrt [ (n2−1) /12  ]

Where n=10.

The answer would be 590.45


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