Data task 84: A New Zealand Level 2 learner connects multiple ideas in an applied local or national context. Two groups have sizes 38 and 39, with means 64 and 68. What is the combined mean?

Data task 84: A New Zealand Level 2 learner connects multiple ideas in an applied local or national context. Two groups have sizes 38 and 39, with means 64 and 68. What is the combined mean?

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