Saturday

April 19, 2014

April 19, 2014

Posted by **Crystal** on Saturday, July 27, 2013 at 7:26pm.

a.71 to 73

b. 69 to 75

c. 66 to 78

d. 63 to 81

- Statistic/Psychology -
**Ms. Sue**, Saturday, July 27, 2013 at 7:28pmI 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**, Sunday, July 28, 2013 at 12:34pmDo 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 = (score-mean)/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**, Wednesday, October 30, 2013 at 2:12amyou must add or subtract the SEM 3 times.

72-9=63

72+9=81

d. 63-81

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