SOLUTION: Determine the σ given the following values: z-scores=-1.25, μ=9.3, x=8.8 Please show all work!!

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Question 876963: Determine the σ given the following values: z-scores=-1.25, μ=9.3, x=8.8
Please show all work!!
Answer by jim_thompson5910(35256) About Me  (Show Source):
You can put this solution on YOUR website!
z = (x - mu)/sigma


-1.25 = (8.8 - 9.3)/sigma


-1.25sigma = 8.8 - 9.3


-1.25sigma = -0.5


sigma = -0.5/(-1.25)


sigma = 0.4