Key Terms Flashcards
Primary research.
Collects new data.
Secondary research
Uses existing data
Qualitative data
Non numerical data
Quantitative data
Numerical data
Probability samples
Simple random.
Cluster.
Systematic.
Stratified random.
Non probability samples.
Convenience/Opportunity.
Snowball.
Quota.
Purposive or Judgement.
Observable variables
Directly observed or measured
Latent variables
Cannot be measured, inferred indirectly through observable variables.
Continuous variables
Take any value within a given range.
Discrete variables
Can take certain values within a range.
Categorical variables
Groups, levels, or categories.
Ratio
Equal intervals and a true zero.
Interval
Equal intervals but no true zero
Ordinal
Ordered categories with unequal intervals.
Nominal
Non ordered categories.
Central tendency
Mean
Median
Mode.
Variability
Range
Standard deviation
Variance.
Distribution
Normal
Bimodal
Skew
Kurtosis.
Charts
Histograms
Bar charts
Scatter plots
Line of best fit / trend line
Research question
Descriptive
Relationship
Correlation
Positive
Négative
Correlation coefficient
Pearsons R
Spearman’s rank
Chi squared
