Distributions

Question 1

Normal distribution

Answer 1

Probability distribution for a random variable, which is symmetric around its mean

Question 2

Skewed distribution

Answer 2

Probability distribution for a random variable, which is asymmetric around its mean

Question 3

Standard deviation

Answer 3

Measure for the variation of the values of a variable in a sample

Question 4

Standard score / z-score

Answer 4

The number of standard deviations by which
the value of an observed value is above or below the mean value. Strength of effects comparable across different scales.