Posted by **Jen** on Wednesday, October 12, 2011 at 6:28pm.

A set of 50 data values has a mean of 15 and a variance of 25. Find the standard score of a data value = 20

- Help plz!! Math.... -
**PsyDAG**, Thursday, October 13, 2011 at 11:47am
Z = (score-mean)/SD

SD^2 = variance

Please only post your questions once. Repeating posts will not get a quicker response. In addition, it wastes our time looking over reposts that have already been answered in another post. Thank you.

- Help plz!! Math.... -
**Jennifer**, Thursday, October 13, 2011 at 12:50pm
I apologize...thank you....so is it

A data point of 20 is one standard deviation above the mean of 15, so the standard or "z" score is 1.0

## Answer this Question

## Related Questions

- Someone plz help me....i need help this is due now - A set of 50 data values has...
- MATH - A set of 50 data values has a mean of 18 and a variance of 4. I. Find the...
- statistics - A set of 50 data values has a mean of 15 and a variance of 36. Find...
- Stats - A set of 50 data values has a mean of 15 and a variance of 36. Find the ...
- Statistics - A set of 50 data values has a mean of 15 and a variance of 25. Find...
- Can someone help me please? - A set of 50 data values has a mean of 15 and a ...
- stats - A set of 50 data values has a mean of 30 and a variance of 4. I. Find ...
- Math....please help - A set of 50 data values has a mean of 27 and a variance of...
- Homework Help - A set of 50 data values has a mean of 48 and a variance of 9. I...
- Statistics - A set of 50 data values has a mean of 35 and a variance of 25. I. ...