If we add a constant 3 to each observation of a data set, then find the mean:
- Increased by 3
- Decreased by 3
- No effect
- None of these
Explanation
If we add a constant (such as 3) to each observation of a data set, the mean will be increased by 3
This is because adding the same constant to each data point shifts the entire data set by that constant value, including the mean.
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