Data types Flashcards
What is raw data
It’s data first collected in a statistical investigation, before it has been sorted or ordered.
What 2 types can raw data be
Quantittive or qualotive
What type of data is qualitive data
Non-numerical data such as type of car or hair type
What type of data is quantative data
Numercial data such as measures of height or weight
What 3 types of data can quantitative data be and one example
Continuous - temperature
Discrete - shoes size
Ordinal - position in a race
Which data of type is categorical data
Qualitive data
Give an example of categorical data
Raw data collected on where people went on holiday would be classed by continent ( Europe, Asia, Africa …)
What is the 2 types of data in related data
Bivariate data or multivariate
What is bivariate data and an example
Involves pairs of related data values - such as exam results and time spent studying
What is multivariate data and an example
Involves sets of 3 or more related data- such as age, height and weight
Which two ways can data be categorised
Primary data and secondary data
What is primary data and how could it be collected
Information that is collected yourself: experiment, survey or questionaire
What is secondary data and how could it be collected
Comes from published sources such as newspapers, books, or the internet: table in a magazine
Advantages of primary data
-Collection method known
-Accuracy known
-Questionaires or surveys can be specifically designed
Disadvantages of primary data
-Collection can be time-consuming
-Collection can be expensive
