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March 3, 2015

March 3, 2015

Posted by **Celest** on Wednesday, July 20, 2011 at 9:07pm.

I. Find the standard score (z) for a data value = 26.

II. Find the probability of a data value < 26.

I think the first part is z=(26-30)/4 = -4/4 = -1. I am not sure how to go about the second problem. I could use any help. Thanks

- stats -
**PsyDAG**, Thursday, July 21, 2011 at 2:09am1. Z =( score-mean)/SD

**Variance = SD squared**

2. Same equation, but find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportion related to Z.

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