9. (Normally distributed quality characteristic) Suppose a quality characteristic of a product is normally distributed with mean 18 and standard deviation 1.5 . The specification limits furnished by the customer are (15,21). Determine what percentage of the product meets the specifications set by the customer.
Added by Mitchell P.
Step 1
Z_lower = (15 - 18) / 1.5 = -2 Z_upper = (21 - 18) / 1.5 = 2 Show more…
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