Collecting Data and Sampling (Leaving Cert Mathematics): Flashcards
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13 cards from this deck
Definition: Categorical data
Definition: Categorical data
Information that fits into groups/categories, not numerical values
What categorical data allows us to do
What categorical data allows us to do
Sort and group information based on shared characteristics
Definition: Ordinal data
Definition: Ordinal data
Categorical data where categories have a natural order or ranking
Key feature distinguishing ordinal from categorical data
Key feature distinguishing ordinal from categorical data
Ordinal has meaningful sequence; regular categorical has no order
Definition: Univariate data
Definition: Univariate data
Only one piece of data collected from each person or item
Meaning of prefix 'uni' in univariate
Meaning of prefix 'uni' in univariate
One
Definition: Bivariate data
Definition: Bivariate data
Two pieces of information collected together from same source
Alternative name for bivariate data
Alternative name for bivariate data
Paired data
Data type: shoe sizes sold in a shop
Data type: shoe sizes sold in a shop
Numerical
Data type: shoe colours sold in a shop
Data type: shoe colours sold in a shop
Categorical
Is class division (1st, 2nd, 3rd) ordinal data?
Is class division (1st, 2nd, 3rd) ordinal data?
Yes, divisions have clear order from best (first) to worst (third)
Keywords often indicating categorical data
Keywords often indicating categorical data
'Favourite', 'colour', 'type'
Rule: Counting variables for uni vs bivariate
Rule: Counting variables for uni vs bivariate
One measurement = univariate; two measurements = bivariate