# Edexcel S1 clarification

Discussion in 'Mathematics' started by retired65, Feb 12, 2012.

1. ### retired65

I an due to tutor a student on S1.
Can anyone confirm Edexcels generally accepted method of finding the median/quartiles from grouped and ungrouped data? (as the range of materials vary hugely in their approach)
The <u>general</u> approach seems from grouped simply divide by 2 for the median and 4 for q1
The general approach for ungrouped is divide by 4 and round up fro q1/q3 and (n+1)/2 for the median.
Please can someone confrim the approach accepted/used for the exams.
Thanks

2. ### retired65

I an due to tutor a student on S1.
Can anyone confirm Edexcels generally accepted method of finding the median/quartiles from grouped and ungrouped data? (as the range of materials vary hugely in their approach)
The <u>general</u> approach seems from grouped simply divide by 2 for the median and 4 for q1
The general approach for ungrouped is divide by 4 and round up fro q1/q3 and (n+1)/2 for the median.
Please can someone confrim the approach accepted/used for the exams.
Thanks

3. ### funkypete83

Round up for discrete and use the exact value for continuous data.
These follows through nicely for interpolation. I find that if students can do the soloman papers they are fine with the actual edexcel.
Good luck

4. ### funkypete83

*this follows*