Displaying Data

Question 1

What are variables?

Answer 1

Something that varies or takes over different values. Can be across (between participants) or within (within participants)

Question 2

What is a value?

Answer 2

A number or category

Question 3

What is a score?

Answer 3

Persons value on a variable

Question 4

What is a categorical variable?

Answer 4

Categorises material by providing names e.g. 1) male, 2) female, 3) other

Question 5

What are the types numerical variables?

Answer 5

Ordinal: order of variables e.g. place in a test
Equal interval: numbers stand for equal amounts for whats being measured (has absolute zero = complete absence of variable)
Ratio variables: same as equal interval but includes absolute zero e.g. weight or time

Question 6

What is a freq table?

Answer 6

Summarises where your data is + how frequently each value of a variable occurs. Useful for showing overall tendencies

Question 7

What is a histogram?

Answer 7

Type of bar graph for visualizing info from a freq table.
Height = freq of interval.
Width = size of interval

Question 8

What is a freq polygon?

Answer 8

Line graph of freq - exactly like histogram but with lines not bars.

Question 9

What are terms for the amount of peaks in a distribution?

Answer 9

Unimodal: One peak
Biomodal: Two peaks
Multimodal: +2 peaks
Rectangular: no peaks

Question 10

Difference between leptokurtic and platykurtic?

Answer 10

Lepto = thicker tail (thinner body)
Platy = thinner tail (thicker body)