| Date | November 2009 | Marks available | 3 | Reference code | 09N.1.sl.TZ0.1 |
| Level | SL only | Paper | 1 | Time zone | TZ0 |
| Command term | Find | Question number | 1 | Adapted from | N/A |
Question
The temperatures in °C, at midday in Geneva, were measured for eight days and the results are recorded below.
7, 4, 5, 4, 8, T, 14, 4
The mean temperature was found to be 7 °C.
Find the value of T.
[3]
a.
Write down the mode.
[1]
b.
Find the median.
[2]
c.
Markscheme
\(\frac{{7 + 4 + 5 + 4 + 8 + T + 14 + 4}}{8} = 7\) (A1)(A1)
Note: Award (A1) for sum + T, (A1) for 56 or 7 × 8 or 8 in the denominator and 7 seen.
T = 10 (A1) (C3)
[3 marks]
a.
4 (A1) (C1)
[1 mark]
b.
4, 4, 4, 5, 7, 8, 10, 14 (M1)
Note: Award (M1) for arranging their numbers in order.
Median = 6 (A1)(ft) (C2)
[2 marks]
c.
Examiners report
This question was well answered by most candidates.
a.
This question was well answered by most candidates.
b.
This question was well answered by most candidates.
c.
