Posted by **Anna** on Thursday, May 24, 2012 at 5:49am.

Charlotte received a score of 68 on both her English and Maths tests. The mean for English was 52 and the mean for Maths was 55. The standard deviations for English and Maths

were 10 and 8 respectively. In which subject did Charlotte perform better? Explain your

decision.

- Maths B -
**PsyDAG**, Thursday, May 24, 2012 at 11:01am
Z = (score-mean)/SD

Find table in the back of your statistics text labeled something like "areas under normal distribution" to find the proportions related to the Z scores. Change to percentiles and compare.

Percentile = precent ≤ a score

- Maths B -
**Anna**, Thursday, May 24, 2012 at 7:18pm
i don't get what you mean. Can you please explain it to me again.

- Maths B -
**PsyDAG**, Friday, May 25, 2012 at 3:27pm
The Z score is the score in terms of standard deviations.

Percentile indicates proportion of scores that are equal to or below a particular score.

Consulting the previously named table should be able to give the percentile for each score for comparison.

If you still don't understand, you need to start a new post indicating the specific problem you are having.

## Answer this Question

## Related Questions

- maths a - Charlotte received a score of 68 on both her English and Maths tests. ...
- Maths B - Charlotte received a score of 68 on both her English and Maths tests. ...
- Maths B - Andrew got 68 for both English and Maths. The mean for english was 52 ...
- MATHS - A store clerk sold 25 maths books and 10 english books for $855.00 .if ...
- maths - the probabilities of a boy passing English and Mathematics tests are x ...
- Maths - If I have the mean and standard deviation of data how do I work out the ...
- statistics - a set of maths exame score mean is 70 and variance is 8. a set of ...
- maths a - us e the formula z=x-u/SD to determine the z score for a score of 34.5...
- Maths - data with mean of 32, standard deviation of 1.2, What is the 99th ...
- Maths literacy,life science,history,geography - I PASSED MATRIC ND I WAS DOING ...