Statisticsmedium · Past Paper
If each observation is decreased by 10%, the mean:
ADecreases by 10%
BDecreases by 10
CRemains same
DDecreases by 1%
✓ Correct Answer: A — Decreases by 10%
Scaling (multiplying by 0.9) applies directly to the mean.
Share this question
More from Statistics
- A card is drawn from a deck of 52 cards. What is the probability that it is a red face card?
- In a data set, if Q1 = 15 and Q3 = 35, what is the interquartile range?
- If mode = 80 and mean = 110, then median is:
- The mean of a set of data is 5. If every value is doubled and then 3 is added, the new mean is:
- In a frequency distribution, the sum of all probabilities (relative frequencies) is: