- AIncrease by 5
- BDecrease by 5
- CStay the same
- DBecome 5 times
Step-by-Step Solution
Adding a constant 5 to each xi adds 5 to the mean, since mean = sum(fi*(xi+5))/sum fi = old mean + 5.
Answer: A) Increase by 5
If every class mark is increased by 5, the mean of the grouped data will:
Class 10Mean of Grouped DataStatistics and Probability
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