Central Tendancy

Question 1

Mean

Answer 1

ADVANTAGES:
-Representative of all values within set of data

DISADVANTAGES:
-Easily distorted by extreme values so less validity in results
-Cannot be used with nominal data

Question 2

Median

Answer 2

ADVANTAGES:
-Unaffected by extreme values
-Appropriate for ordinal data

DISADVANTAGES:
-Not representative of whole data set as just uses ‘middle’ values

Question 3

Mode

Answer 3

ADVANTAGES:
-Used for nominal data
-Unaffected by extreme values as uses most common value

DISADVANTAGES:
-Not a useful way of describing data when there are multiple modes

Question 4

What is central tendancy?

Answer 4

Central tendancy informs us about the middle values for a set of data by finding averages

They are a type of descriptive statistic, meaning we can’t draw any conclusions from the mean, median or mode

Question 5

Link to levels of measurement

Answer 5

Nominal - Mode

Ordinal - Mode, Median

Interval and Ratio - Mean, median, mode