2. (a) Some adults and some children attended a spelling test. The following is the scores obtained by the contestants.

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2 A Some Adults And Some Children Attended A Spelling Test The Following Is The Scores Obtained By The Contestants 1 (39.21 KiB) Viewed 16 times

2. (a) Some adults and some children attended a spelling test. The following is the scores obtained by the contestants. Adults : 55, 58, 67, 74, 63, 61, 63, 71, 56, 53, 54, 78, 73, 64, 62 Children: 86, 95, 89, 72, 61, 84, 77, 92, 81, 54, 43, 68, 62, 67, 83 (i) Construct 2 stem-and-leaf diagram to represent the data. (4 marks) (ii) Find the mean and standard deviation for adults' scores. (5 marks) (iii) Given that the mean scores for children is 74.27, make a comparison between the central of tendency of adults and children scores. (2 marks) (iv) Without further calculation, make two comparisons between the spread of adults and children scores. (2 marks)