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The tensile strength of a metal part is normally distributed
with mean 40 pounds and standard deviation
5 pounds. A part is considered defective if the tensile strength
is less than 35 pounds.
(a) what is the probability that a part is defective?
(b) If a testing sample consists of 5 parts, what is the
expected number of parts defective in
such a sample? Assume that each part is independent of the
others.
The tensile strength of a metal part is normally distributed
with mean 40 pounds and standard deviation
5 pounds. A part is considered defective if the tensile strength
is less than 35 pounds.
(a) what is the probability that a part is defective?
(b) If a testing sample consists of 5 parts, what is the
expected number of parts defective in
such a sample? Assume that each part is independent of the
others.
11 Oct 2023
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