0580 P23 - Nov 2014 - Q17 - 6 marks
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200 boxes of cornflakes have masses m grams.
(a) Estimate the interquartile range. [2]
(b) Find P(m ≤ 500) for a randomly selected box. [2]
| Mass m (g) | 496 < m ≤ 500 | 500 < m ≤ 504 | 504 < m ≤ 508 | 508 < m ≤ 510 |
|---|---|---|---|---|
| Frequency | 16 | 74 | 104 | 6 |
| Frequency density | 4 |
(c) Complete the frequency densities for a histogram. [2]
