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QUESTION
Please explain how to find the Z value The life span of a DVD player produced by one major company is known to be normally distributed with a mean of...
The life span of a DVD player produced by one major company is known to be normally distributed with a mean of 6.2 years. If 4.01% of the DVD players have a life span of more than 8 years what is the standard deviation of the DVD player's life span?
