Homework Help: statistics

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 ...
Psychology Statistics - What raw score marks the cut off score for the children...
Statistics - a score of 10 indicates severe depression, while a score of 0 ...
Statistics - If the mean of a set of data is 20.00 and 12.20 has a z-score of -1...
statistics - A school counselor tests the level of depression in fourth graders ...
statistics - A school counselor tests the level of depression in fourth graders ...
Statistics - A school counselor tests the level of depression in fourth graders ...
Statistics - A school counselor tests the level of depression in fourth graders...
statistics - A school counselor tests the level of depression in fourth graders ...
statistics - 2. Punkey Electronics, a small manufacturer of electronic research ...

For Further Reading

First Name:
School Subject:
Answer: