Foundation November 2020 Paper 2 Q16

EdexcelCurrent spec5 marksGrouped Data

16 The table shows information about the lengths of time, in minutes, 120 customers spent in a supermarket.

Length of time (\(L\) minutes)Frequency
\(20 \lt L \leqslant 30\)6
\(30 \lt L \leqslant 40\)26
\(40 \lt L \leqslant 50\)31
\(50 \lt L \leqslant 60\)40
\(60 \lt L \leqslant 70\)17
(a) Write down the modal class. (1)
(b) Work out an estimate for the mean length of time spent by the 120 customers in the supermarket. (4)
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