1.4 Types of data

Question 1

What are quantitative variables/data?

Answer 1

» Variables or data associated with numerical observations

Question 2

What are qualitative variables/data?

Answer 2

» Variables or data associated with non-numerical observations

Question 3

What is a continuous variable?

Answer 3

» That can take any value in a given range
» Such as time, e.g 2 seconds, 2.1, 2.01

Question 4

What is a discrete variable?

Answer 4

» That can only take a specific value in a given range
» Such as a number of people in a family, as you cannot have 2.5 of children

Question 5

What are classes?

Answer 5

» Where the data values in not data shown, but given in a range

Question 6

What do the class boundaries show?

Answer 6

» Maximum and minimum values that belong in each class

Question 7

What is the midpoint?

Answer 7

» The average of the class boundaries

Question 8

What is the class width?

Answer 8

» The difference between the upper and lower class boundaries