Practice question

MCQ

Question

The mean and standard deviation of the weight of boys in a school is 60 kg and 5 kg, respectively. Large enough random samples of 40 students were taken. What is the mean of average weight of all samples?

Choose one · Correct answer highlighted

30 kg 12 kg 60 kg Correct 75 kg

We can see that using formula we get 60 kg. Calculation gives this directly, check steps: apply rule, substitute values, simplify to get 60 kg.

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