for 150 beams of a particular type the mean and standard deviation of breadth were found to be respectively 8.5mm & 0.5mm. test if the observed mean differs significantly from 8mm
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The diameter is known to have a standard deviation of σ = 0.0001 inch. A ... Find the sample size required to construct a 95 percent confidence interval on the mean, that has total width of. 1.0. ... solution and the observed etch rates (in mils/min) are shown below: ... Experiments with a Single Factor: The Analysis of Variance.
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