A data set has mean 17. Each value is multiplied by 2 and then 3 is added. What is the new mean?
Answer and explanation
Correct answer: C.
- Step 1: The mean transforms like each value: .
- Step 2: .
Answer
.
Why not the others: : The added constant was left out. : The multiplication was left out. : The constant was added before multiplying.
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