Posted by **deandra** on Sunday, December 4, 2011 at 6:45pm.

Consider a population with and .

(A) Calculate the z-score for from a sample of size 13.

(B) Could this z-score be used in calculating probabilities using Table 3 in Appendix B of the text? Why or why not?

- MATH -
**PsyDAG**, Monday, December 5, 2011 at 1:51pm
Values of population not indicated. We do not know what is contained in Table 3. If Table 3 is the one I describe below, the answer is yes, if the distribution is approximately normal.

Z = (score-mean)/SD or SEm for distribution of means.

SEm = SD/√n

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to the Z score.

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