Hypothesis Section C

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Could someone read my hypothesis for 2011 Paper 2, Section C?

This is just the hypothesis I've written, I just want to know if there's anything else I should have included or if the wording is off thanks.

Hypothesis: The mathematics results as demonstrated from the results of a numeracy test will show a greater mean improvement in Class A of year 8 students attending Mountain hills Secondary College if they are given praise after successfully answering a numerical problem and given free time as a reward for completing 5 numeracy worksheets for four weeks as opposed to Class B who are not given reinforcement to complete numerical problems.