Posted by **Mich** on Tuesday, September 27, 2011 at 10:29pm.

1) A scale measuring prejudice has been administered to a large sample of respondents. The distribution of scores is approximately normal with a mean of 31 and a standard deviation of 5. What percentage of sample had scores below 20?

- statistics -
**michelle**, Tuesday, September 27, 2011 at 11:29pm
normalcdf(-100,20,30,5)

0.0228

- statistics -
**PsyDAG**, Wednesday, September 28, 2011 at 2:59am
Z = (score-mean)/SD

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

## Answer this Question

## Related Questions

- statistics - A scale measuring prejudice has been administered to a large sample...
- statistics - An SRS of size n is taken from a large population whose ...
- Statistics - The distribution of IQ scores is a nonstandard normal distribution ...
- Statistics - The Wechsler Adult Intelligence Scale (WAIS) is a common "IQ test" ...
- statistics - What is wrong with the following statements? a) For a large n, the ...
- statistics - IQ scores are normally distributed with a mean of 105 and a ...
- Essentials of statistics - A populations of scores forms a normal distribution ...
- probability and statistics - a population forms a normal distribution with a ...
- Statistics - Suppose you administered an anxiety test to a large sample of ...
- statistics - Suppose you administered an anxiety test to a large sample of ...

More Related Questions