Statisticshard · Past Paper
A data has mean 20. If 5 is added to each term, the coefficient of variation will:
AIncrease
BDecrease
CRemain same
DDouble
✓ Correct Answer: B — Decrease
SD remains same but mean increases, so CV = SD/Mean * 100 decreases.
Share this question
More from Statistics
- A student has 60% chance of passing Math and 70% chance of passing English. What is the probability the student fails both?
- If the mean of $x_1, x_2, ... x_n$ is $\bar{x}$, what is the mean of $ax_1+b, ax_2+b, ... ax_n+b$?
- If two coins are tossed, find the probability of getting at most one tail.
- In an ogive, the x-axis represents:
- Mean of $x, x+1, x+2, x+3, x+4, x+5$ is: