6. What is the most common measure of variability?
A. Variance
B. Standard deviation
C. Range
D. Mode
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5. Who popularized the use of the correlation coefficient?
A. Francis Galton
B. Charles Darwin
C. Robert Fischer
D. Max Planc
4. What is another term for variability?
A. Central tendency
B. Spread/dispersion
Correlation
D. Scatterplot
3. In the formula for calculating the variance, what does the letter “n” represent?
A. Sample size
B. Population size
C. Lowest score
D. Highest score
2. Which measure of variability is most general, and hence least useful?
A. Variance
B. Standard deviation
C. Mode
D. Range