Mean of distribution with z score

Mathmom1

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May 15, 2019
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Hi I need help with this problem I am not sure how I would solve it. “In a distribution, the number seven has a Z score of -2 and the number 19 has a Z score of 1. What is the mean of the distribution?” I am not giving the standard deviation or any other information so I’m not sure how I would solve this. Thank you!
 

tkhunny

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Apr 12, 2005
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You are ALMOST given the Standard Deviation.

Z-Score ------(-2) -------(-1)--------(0)--------(1)----------(2)
Std Dev ------(-2) -------(-1)--------(0)--------(1)----------(2)
Prob Stmt ------(7) -------(??)--------(??)--------(19)----------(??)

What say you? Can you spot the Standard Deviation in there?
 
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