The table below gives the scores obtained by 40 students in a weekly quiz

MATHEMATICS · Subjective · CBSE · Mathematics · Statistics · Statistics

Problem

The table below gives the scores obtained by 40 students in a weekly quiz. Scores (marks) 40–50 | 50–60 | 60–70 | 70–80 | 80–90 Frequency 6 | 8 | 12 | 9 | 5 Calculate the standard deviation of the scores (correct to one decimal place).

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