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Mathematics 15 Online
celticcat:

I f we have a frequency table of marks of students in a test, and the marks were 'up to 10' , 'up to 20' etc , in working out the mean I guess you would use the midpoint value for the marks. Right?

jhonyy9:

so then use the midpoint value for the marks how you ve wrote how you think this is the correct way ?

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