Some Data Terminology

Question 1

Primary data

Answer 1

Primary data is collected by the user of the data

Question 2

Secondary data

Answer 2

Secondary data is second hand (company using Gov stats)

Question 3

Qualitive (categorical)

Answer 3

Data not measured nor counted (eye colour)

Question 4

Quantitive (numeric)

Answer 4

Data that has been measured or counted (age)

Question 5

Discrete

Answer 5

Data that has distinct, separate values (shoe size)

Question 6

Continuous

Answer 6

Data that has a range of continuous values (height) 178 cm doesnt mean you’re exactly 178 cm.

Question 7

Raw data

Answer 7

Data that has not yet been processed

Question 8

Cleaned data

Answer 8

Data that has had errors and omissions corrected or otherwise dealt with.

Question 9

Unordered

Answer 9

Data that is not ordered

Question 10

Ordered

Answer 10

Data that is ordered usually by magnitude.

Question 11

Ungrouped data

Answer 11

Data where each value is known exactly. Only discrete data can be ungrouped.

Question 12

Grouped data

Answer 12

Data is grouped into classes. Usually collated in a frequency table (continuous data is always grouped)

Question 13

Single variable data

Answer 13

Data where each item has just one property (just weight)

Question 14

Bivariate data

Answer 14

Paired data where each item has two properties (weight and height)

Question 15

Multivariate data

Answer 15

Data where each item has more than two properties

Question 16

Average

Answer 16

A measure of central tendency (mean mode median)

Question 17

Spread

Answer 17

A measure of dispersion (range, Inter quartile range and standard deviation)

Question 18

Skewness

Answer 18

A measure of how symmetric versus skewed the data is

Question 19

Outliers

Answer 19

Extreme values in the data