One of the most common measures of variability in a data set or population.

The correct answer is D. Standard Deviation. Standard Deviation (D) is one of the most widely used measures of variability because it quantifies how spread out values are around the mean - a small standard deviation means data clusters tightly, while a large one means it's widely spread. A (Normal Distribution) is wrong - i

Measure Phase

Question

Options

ANormal Distribution
BAlpha Risk
CMean
DStandard Deviation

How the community answered

(20 responses)

B
5% (1)
D
95% (19)

Explanation

Standard Deviation (D) is one of the most widely used measures of variability because it quantifies how spread out values are around the mean - a small standard deviation means data clusters tightly, while a large one means it's widely spread.

A (Normal Distribution) is wrong - it's a shape/pattern that data can follow, not a measure of variability itself.
B (Alpha Risk) is wrong - it refers to the probability of a Type I error in hypothesis testing, not variability.
C (Mean) is wrong - the mean is a measure of central tendency (the average), not spread.

Memory tip: Think of "standard" as "how far values standardly stray from the center." If the answer is about spread or scatter, default to Standard Deviation - it's the go-to variability metric in nearly every statistics context.

Topics

#standard deviation#variability#descriptive statistics#population

Community Discussion

No community discussion yet for this question.

Full CSSGB Practice