Chi-Squared Distribution ➤ A manufacturer knows from experience that the variance in the diameter of the roller bearings

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Chi-Squared Distribution ➤ A manufacturer knows from experience that the variance in the diameter of the roller bearings

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Chi Squared Distribution A Manufacturer Knows From Experience That The Variance In The Diameter Of The Roller Bearings 1
Chi Squared Distribution A Manufacturer Knows From Experience That The Variance In The Diameter Of The Roller Bearings 1 (221.69 KiB) Viewed 26 times
Chi-Squared Distribution ➤ A manufacturer knows from experience that the variance in the diameter of the roller bearings used in its bearings is 3.15 μm2. Rejecting bearings drives up the unit cost. However, the manufacturer rejects any batch of roller bearings if the sample variance of 20 pieces selected at random exceeds 5.00 μm2. Assuming a normal distribution, what is the probability that any given batch might be rejected even though its true variance is actually within the tolerance limits?
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