SOLUTION: If 9% of all calculators are defective, find the mean, variance and standard deviation of a lot of 500 calculators.
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Question 393634: If 9% of all calculators are defective, find the mean, variance and standard deviation of a lot of 500 calculators.
Answer by robertb(5830) (Show Source): You can put this solution on YOUR website!
Let X = r.v. representing the # of defects.
Then mean is , variance is
, and standard deviation is
to the nearest tenth.
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