Data task 94: A New Zealand Level 2 learner connects multiple ideas in an applied local or national context. Two groups have sizes 40 and 40, with means 65 and 69. What is the combined mean?

Data task 94: A New Zealand Level 2 learner connects multiple ideas in an applied local or national context. Two groups have sizes 40 and 40, with means 65 and 69. What is the combined mean?

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