Question

For a frequency distribution of 200 marks,with intervals 1-5,6-10,11-15,16-20,21-25,,,the mean and S.D were found to be 40&15 respectively,, later it was discovered that the mark 43 was misread as 53,,find the corrected mean & S.D corresponding to the corrected frequency distribution

Answer 1

Answer:

I AM NO UNDERSTAND THIS OUESTION OKKK....