Mathematics 9709 · AS & A Level · Sampling and estimation

Sampling and estimation — practice question

The back-to-back stem-and-leaf diagram displays the values for two variables $A$ and $B$. Key: $4 | 16 | 7$ indicates that $A = 0.164$ and $B = 0.167$.
(i)[3]

Find the median and the interquartile range of $A$.

(ii)[3]

You are told that, for variable $B$, the median is $0.171$, the upper quartile is $0.179$ and the lower quartile is $0.164$. Draw box-and-whisker plots for $A$ and $B$ on the same diagram on graph paper.

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