Asked by John

if the mean of a set of data is 23.00 and 10.00 has a z-score of -1.30, then the standard deviation must be?
Answered by PsyDAG
Z = (score-mean)/SD, therefore

SD = (score-mean)/Z

Insert your values and solve for SD.
Answered by Anonymous
If the mean of a set of data is 23.00, and 10.00 has a z-score of –1.30, then the standard deviation must be:
A.
10.00
B.
9.8
C.
10.50
D.
10.20
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