Measures Of Central Tendency

Question 1

Mean

Answer 1

• calculated by adding up all the data items and dividing by the number of data items
• can only be used with ratio and interval level data

Question 2

Mode

Answer 2

• to calculate data items need to be arranged in order.
• the popular group is the group with the greatest frequency
• with nominal data, it is the category that has the highest frequency count
• with interval and ordinal data it is the data item that occurs most frequently

Question 3

Median

Answer 3

• the middle value
• to calculate add the two data items and divide by two
• median can be used with ratio, interval and ordinal data

Question 4

What does measure of central tendency mean ?

Answer 4

• informs us about the central values for a data set