distributions

Question 1

Normal distribution

Answer 1

• curve is always symmetrical
• curve extends outwards never touches 0
• mean, median, mode occupy around same mid-point (draw mode first)

Question 2

What is a skewed distribution?

Answer 2

• spread of data
• not symmetrical
• data is clustered at one end

Question 3

Positive skew

Answer 3

• most of data is concentrated on LEFT
• long tail is on the right side
• mean higher than median/mode
• seen in a hard test

Question 4

Negative skew

Answer 4

• most of data is concentrated on RIGHT
• long tail on the left side
• mean lower than median/mode
• seen in a easy test