Question:

Past data indicate that the variance of measurements made on sheet metal stampings by experienced quality-control inspectors is 0.25 square inch. Such measurements made by an inexperienced inspector could have too large a variance (perhaps because of inability to read instruments properly) or too small a variance (perhaps because unusually high or low measurements are discarded). If a new inspector measures 101 stampings with a variance of 0.13 square inch, test at the 0.05 level of significance whether the inspector is making satisfactory measurements. Assume normality.

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Deliverable: Word Document