Posted by **phil** on Wednesday, July 18, 2012 at 7:55pm.

So if a scale has 30 items in it, and if an individual gets a score of 20 what does this mean? The only way to answer this is to look at the standardization sample, find out what the mean score in the sample was, let's say 15, and standard deviation in the population was five then a score of 20 is one standard deviation above the mean. If we take the mean raw score and make it equal 50 and then take the standard deviation score and make that equal to 10 then a score of 20 on the scale is equal to what number?

- statistics -
**PsyDAG**, Wednesday, July 18, 2012 at 8:06pm
Assuming that each item on the scale has a value of one, how could the mean be 50?

Are you talking about merely a number (raw score, 20 seems to be the raw score) or a Z score? If the latter,

Z = (score-mean)/SD

- statistics -
**phil**, Wednesday, July 18, 2012 at 10:04pm
thanks!

- statistics -
**PsyDAG**, Thursday, July 19, 2012 at 10:53am
You're welcome.

## Answer this Question

## Related Questions

- statistics - So if a depression scale has 30 items in it, and if an individual ...
- Psychological Statistics - For a population with a mean of 80 and a standard ...
- Statistics - The Wechsler Adult Intelligence Scale (WAIS) is a common "IQ test" ...
- statistics - A study of the Consideration of Future Consequences(CFC) scale ...
- Statistics - IQ test scores are normally distributed with a mean of 97 and a ...
- Statistics - What does this statement mean - "Measurements are nearly always of ...
- statistics - The mean scale score on the mathematics examinatin of ninth graders...
- statistics - The mean scale score on the mathematics examinatin of ninth graders...
- statistics - The mean scale score on the mathematics examinatin of ninth graders...
- Pyschological Statistics - In a distribution with a standard deviation of eight...