Statistic/Psychology
posted by Crystal .
Joe had a score of 72 on the Counseling Aptitude Scale, and the standard error of measurement of the scale is 3. Where would we expect Tom's true score to fall 99.5 percent of the time?
a.71 to 73
b. 69 to 75
c. 66 to 78
d. 63 to 81

Statistic/Psychology 
Ms. Sue
I see you haven't resolved this question about whose score you want. Please check with your teacher about this.
http://www.jiskha.com/display.cgi?id=1374878955 
Statistic/Psychology 
PsyDAG
Do you mean standard error (SEm) or standard deviation (SD).
SEm = SD/√n, but no n is indicated.
If you meant SD, then use this equation.
Z = (scoremean)/SD
Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion/probability (.0025 or .4975) and its Z score.
With equation above, calculate score for both ± Z. 
Statistic/Psychology 
Peter
you must add or subtract the SEM 3 times.
729=63
72+9=81
d. 6381
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