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December 20, 2014

December 20, 2014

Posted by **jane** on Tuesday, October 25, 2011 at 7:52am.

(A) Calculate the z-score for x =72.7 from a sample of size 45.

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

- Statistics -
**PsyDAG**, Tuesday, October 25, 2011 at 12:50pm(A) I don't know if your "x" stands for an individual score or the sample mean.

If individual score, ignore sample size.

Z = (score-mean)/SD

If sample mean:

Z = (score-mean)/SEm

SEm = SD/√n

(A) We still don't have your Table 3 or know what it is.

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