Central Tendency & Variability

Question 1

3 Ms

What is central tendency?

Answer 1

Central tendency is a statistical measure that identifies a single value that represents the entire distribution of data.

• Mean- average score
• Mode- most common score
• Median- middle score after ascending order

Question 2

What is variability?

Answer 2

Variability is a numerical way of describing how much spread there is in a distribution.
It is a calculation of the amount of difference existing within a set of scores

• Range- subtracting the minimum score from the highest
• Variance- average of the squared deviations from the mean
• Standard Deviation- the square root of the average of the squared deviations from the mean