SOLUTION: how to show details of reaching the answer for a Normal distribution with a mean of 8 and a standard deviation of 6, the value -7 has a z value of ? I believe the correct anser

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Question 422856: how to show details of reaching the answer for
a Normal distribution with a mean of 8 and a standard deviation of 6, the value -7 has a z value of ? I believe the correct anser if -2.5 but don't know how I achieved it.
Answer by stanbon(75887) About Me  (Show Source):
You can put this solution on YOUR website!
how to show details of reaching the answer for
a Normal distribution with a mean of 8 and a standard deviation of 6, the value -7 has a z value of ? I believe the correct anser if -2.5 but don't know how I achieved it.
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You found out how far -7 was from 8: -7-8 = -15
The negative means "below 8"
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You measured that distance in standard deviations: -15/6 =-2.5
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So -7 is 2 1/2 standard deviations below the mean.
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Cheers,
Stan H.