6-50. A study of B.A. (Hons.) Economics examination results of 1000 students in 1990 gave thé metm grade as 78 and the standard deviation as 8-0. A similar study in 1995 revealed the mean grade of the group as 80 and the standard deviation as 7-6. In which year was there the greater (i) absolute dispersion, (ii) relative dispersion ? What can we say about the average performance of the students over time ?

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4 6:50. A study of B.A. (Hons.) Economics examination results of 1000 students in 1990
the smetm grade as 78 and the standard deviation as 8-0. A similar study in 1995 revealed the mean grade
gave
of the group as 80 and the standard deviation as 7-6. In which year was there the greater
(i) absolute dispersion,
(ii) relative dispersion ?
What can we say about the average performance of the students over time ?
She s sv ?
Transcribed Image Text:4 6:50. A study of B.A. (Hons.) Economics examination results of 1000 students in 1990 the smetm grade as 78 and the standard deviation as 8-0. A similar study in 1995 revealed the mean grade gave of the group as 80 and the standard deviation as 7-6. In which year was there the greater (i) absolute dispersion, (ii) relative dispersion ? What can we say about the average performance of the students over time ? She s sv ?
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