Friday

January 30, 2015

January 30, 2015

Posted by **melissa** on Saturday, March 15, 2014 at 3:24pm.

a. Use the range rule of thumb to find the maximum and minimum usual heights of three-year-old girls.

b. Based on the result, is the height of 87.8 cm unusual?

c. Should the physician be concerned?

- stat -
**PsyDAG**, Monday, March 17, 2014 at 10:42amI don't know what your "rule of thumb" is, but:

a. 95% = mean ± 1.96 SD

b. 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 related to the Z score.

c. If the probability is < .0250 in the smaller portion, the physician might be concerned.

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