A sixty-student quiz distribution

A sixty-student quiz distribution

Secondary 2
TGM Original Questions

Correct answers 7,8,9,10,11,12,13 have frequencies 5,8,12,14,10,7,4. Find

  1. how many scored below 10,
  2. the mode, median and mean,
  3. the pie angle for score 12,
  4. \(P(X\ge9)\) and \(P(X\le11)\),
  5. the bar height for score 8 if the score-10 bar is 2.8 cm.

Solution:

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Answer:(a) \(25\); (b) mode \(10\), median \(10\), mean \(593/60\approx9.88\); (c) \(42^\circ\); (d) \(47/60,49/60\); (e) \(1.6\) cm.

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