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.
Related MCQs
- One-third
- Same
- Three times
- None of these
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- Variance becomes zero only when every observation is identical.
- Variance measures central tendency.
- Variance is always equal to Standard Deviation.
- None of these
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- 1/11
- 1/6
- 3/11
- None of these
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- 4/16
- 15/16
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- 4 bags
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