Unit 5 - Normal Distribution : Standised Scored

Question 1

What are z-scores?

Answer 1

Determines how many standard deviation a raw score is from the mean.
Can be used to determine the probability of an event occurring.

Question 2

Types of Z-scores

Answer 2

Positive - the data value lies above the mean
Negative - the data value lies below the mean

Question 3

Z-score formula

Answer 3

z = (x - μ) / σ

x - score
μ - mean
σ - standard deviation