The number of bags of potato crisps sold per day in a bar was recorded over a two-week period. The results are shown below. 20 15 10 30 33 40 5 11 13 20 25 42 31 17 a Calculate the mean of these data. b Draw a stem and leaf diagram to represent these data. c Find the median and the quartiles of these data. An outlier is an observation that falls either 1.5 x (interquartile range) above the upper quartile or 1.5 x (interquartile range) below the lower quartile. d Determine whether or not any items of data are outliers. e On graph paper draw a box plot to represent these data. Show your scale clearly. f Comment on the skewness of the distribution of bags of crisps sold per day. Justify your answer.

AppendixLO1