| Date | May Specimen | Marks available | 1 | Reference code | SPM.1.sl.TZ0.1 |
| Level | SL only | Paper | 1 | Time zone | TZ0 |
| Command term | Write down | Question number | 1 | Adapted from | N/A |
Question
Consider the frequency histogram for the distribution of the time, \(t\) , in minutes of telephone calls that Helen made last week.
Complete the frequency table for this distribution.
Write down the modal class.
Write down the mid interval value of the \(10 < t \leqslant 15\) class.
Use your graphic display calculator to find an estimate for the mean time.
Markscheme
(A2) (C2)
Note: Award (A2) for four correct entries, (A1) for three correct entries, (A0) otherwise.
\(0 < t \leqslant 5\) (A1) (C1)
\(12.5\) (A1) (C1)
\(\frac{{275}}{{30}}\) (M1)
Note: Award (M1) for division with \(275\) seen.
\(= 9.17\) (\(9.16666 \ldots \)) (A1)(ft) (C2)
Note: Follow through from their parts (a) and (c), irrespective of whether working is shown.
