SOLUTION: The mean life of an appliance manufactured by your company is 10 years with a standard deviation of 3.5 years.
What is the Z value to find the area for a machine that lasted 13
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Question 1087807: The mean life of an appliance manufactured by your company is 10 years with a standard deviation of 3.5 years.
What is the Z value to find the area for a machine that lasted 13 years?
Answer by jim_thompson5910(35256) (Show Source): You can put this solution on YOUR website!
Start with the z-score formula.
Plug in the mean ( is the greek letter mu)
Plug in the standard deviation ( is the greek letter sigma)
Plug in the raw score
Subtract in the numerator
Divide
Round to the nearest hundredth (refine the accuracy however you need to)
The z value is roughly
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