Week 9

Question 1

State the percentile for a normally distributed data sets standard deviation

Answer 1

1SD - 34.1
2SD - 13.6
3SD - 2.1
4SD - 0.1

Question 2

What is the meaning of a small and large standard deviation

Answer 2

Small means the values are closer to the mean

Larger means the values are more spread from the mean

Question 3

Describe leptokurtic, mesokurtic and platykurtic

Answer 3

Lepto - tallest peak, positive kurtosis value - more values away from the mean
Meso - normally distributed
Platy - Smallest peak, negative kurtosis value, more values close to the mean

Question 4

Describe frequency distribution

Answer 4

Positively skewed - skewed to the right
Symmetrical - bell - shape curve
Negatively skewed - skewed to the left

Question 5

Define ratio

Answer 5

A scale with a true zero point

E.g. weight

Question 6

Define interval scales

Answer 6

No absolute zero
A scale where we can speak about differences between points of measurement
E.g. temperature and direction (degrees)

Question 7

Define ordinal scales

Answer 7

A scale used to rank responses

Numbers are assigned to signify order or rank

Question 8

Define a nominal scale

Answer 8

A scale used to categorise participants into different groups