STATISTICS

QUESTION 7 A group of 30 grade 3 children did two spelling tests, one at the beginning of term and one at the end. The marks (percentages) on the two tests were grouped into classes with class width of 15%, the first class being 0 -14, the second class being 15 -29, etc. The graphs are shown in the following figure. The solid line represents the first test and the dashed line represents the second test. 10 . number 6 of children second test 4 first test 3 - 2 - - - - - - - 1 $ - - - - - - - - - - - - - - - - - - - - - { - - - - - - -f - - - - - - { - - - - - -.3 -- - - - - { - - - - - - -[- - - - - - - - - - - - - - 7 14,5 22 29,5 37 44,5 52 59,5 67 74,5 82 89,5 97 104.5 Percentages