The following data represents the temperatures of a city over three weeks:
\[
\begin{array}{cccccccc}
21 & 41 & 42 & 26 & 25 & 25 & 43 & 24 \\
25 & 19 & 18 & 41 & 17 & 40 & 38 & 33 \\
32 & 29 & 33 & 28 & 34 & & & \\
\end{array}
\]
a) Draw a stem-and-leaf plot, then deduce the median and the mode.
Stem-and-Leaf Plot:
1 | 7 8 9
2 | 1 4 5 5 5 6 8 9
3 | 2 3 3 4 8
4 | 0 1 1 2 3
Median: First arrange all values in order:
17, 18, 19, 21, 24, 25, 25, 25, 26, 28, 29, 32, 33, 33, 34, 38, 40, 41, 41, 42, 43
There are 21 data points, so the median is the 11th value: \(\boxed{29}\)
Mode: The value that appears most frequently is \(\boxed{25}\) (appears 3 times)
MR/Nasef.N
b) Multiple choice: What is the range of this data?
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