Question
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7.7 years, and standard deviation of 1.5 years. If you
A manufacturer knows that their items have a normally distributed lifespan, with a mean of 7.7 years, and standard deviation of 1.5 years.
If you randomly purchase 23 items, what is the probability that their mean life will be longer than 8 years?
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Algebra And Trigonometry Enhanced With Graphing Utilities (Subscription)
Authors: Michael Sullivan, Michael Sullivan III
7th Edition
0134273842, 9780134273846
