Useful in specific circumstances.
Useful for locating rare populations.
Selection bias is minimized.
BMI in groups : Histogram
Age groups : Box plots.
BMI in kg/m2 by gender : Mean and SD by gender
Age in years : Frequency distribution
Number of episodes of disease in a patient over a year.
Reduction in blood pressure following antihypertensive treatment.
Serum bilirubin level (mmol/L).
Severity of haemophilia (mild/moderate/severe).
A relevant chapter from a textbook
A TV documentary
A peer reviewed research article
A newspaper article
Specific, measurable, achievable, relevant, time-bound
Specific, measurable, appropriate, reliable, time-bound
Simple, measurable, attainable, relevant, testable
Simple, measurable, appropriate, relevant, testable
The rows and columns in the table are associated
Neither of the two
The rows and columns in the table are not associated
Either of the two
To see if the questions are understood by the target population
If the first five respondents fill in the questionnaire well you may not need to undertake a study with more people
To help you decide on the best way to analyse the data
To check that the responses you receive are what you need to answer your research question
Can be reduced by increasing power
Reject a true null hypothesis
Failed to reject a false null hypothesis
One sample t-test
One-way analysis of variance (ANOVA)
Probability sampling is every potential subject has equal chance of being chosen
Random selection is used in quota sampling.
Non probability sampling is a sampling method that allows to draw valid conclusions about population
Stratified sampling does not use the random selection.