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•••••••••••••                                                            35
                                                 •  Median, mode and range  •  •  •
                                                                                         B   Decide the best way to find:
                                                  REMEMBER
                                                                                            a  the median height   b  the median weight   c  the median age.   ~=M•l¥1U~
                                                  The value which occurs   The value in  the middle  I The difference between
                                                  most often is the mode.   of a set of values   the largest and smallest
                                                            I  is the median.   value is the range.   •   Work out the range for:             PAGE 61
                                                                                            a  their heights   b  their weights   c  their ages.
                                                 This group of children ore discussing their height, weight and age.
                                                                                         •   This table shows heights of another group of children.
                                                 II  Design a table to show this data.
                                                                                          Hannah   Iqbal   Julian   Katy   Leela   Mohan   Nicky   Oliver   Paulo
                                                                                          127cm   131 cm   122cm   130cm   133cm   125cm   132cm   130cm
                                                                                         Find:  a  the modal height   b  the median height   c  the range.
                                                                                         B   Do you think the group in •   is about the some age, younger or older
                                                                                            than the first group?
                                                                                            Explain what you think and why.
                                                                                           CHALLENGE
                                                                                           •  Design a table about these 5 children so that the facts
                                                                                            on their cords ore  true.
                                                                                           •  Make sure the meosurements you choose ore  sensible!





                                                 •   Write the mode for:
                                                    a  their heights   b  their weights   c  their ages.


         rn                                                                                                                      Challenge


         Open: design a table to show data.    a  138cm    b  38kg     c  10 years         a  135cm    b  41  kg   c  10 years   Open: design a table with heights,
         Possible design:                                                q months                                     q months   weights and ages consistent with
                                                                                                                                 the mode, median and range given.
                                1
         Name     Height  Weight  Age
                                                                                                                                 Possible solution:
         Amy      131  cm  42kg   10 years
                                 3 months                                                  a  25cm                 c  q months    Name    Height  Weight  Age
         Bianca  127cm  26kg     10 years                                                                                         Quintin  128cm  37kg    10 years
                                 6 months                                                                                                                 10 months
         Cara     138cm  41  kg   10 years                                                                                        Rachel  135cm  33kg     11  years
                                                                                           a  130cm    b  130cm
                                 8 months                                                                                                                 8 months
         David    130cm  44kg    11  years                                                                                        Steve   132cm  26kg     10 years
                                                                                                                                                          10 months
         Ed       135cm  55kg    10 years
                                 q months                                                  The second group is  likely to be      Tara    11qcm  33kg     11  years
                                                                                           younger than the first group as they                           5 months
         Finn     152cm  38kg    10 years
                                                                                           are, on  average, shorter.             Mark    135cm  44kg     11  years
                                 10 months
                                                                                                                                                          6 months
         Gary     138cm  38kg    10 years
                                 q months
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