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Feb/Mar 2023 p52 q1
2477
Each year the total number of hours, \(x\), of sunshine in Kintoo is recorded during the month of June. The results for the last 60 years are summarised in the table.
| \(x\) | 30 \(\leq x <\) 60 | 60 \(\leq x <\) 90 | 90 \(\leq x <\) 110 | 110 \(\leq x <\) 140 | 140 \(\leq x <\) 180 | 180 \(\leq x <\) 240 |
|---|---|---|---|---|---|---|
| Number of years | 4 | 8 | 14 | 25 | 7 | 2 |
(a) Draw a cumulative frequency graph to illustrate the data.
(b) Use your graph to estimate the 70th percentile of the data.
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