Census
A government collects information from every person in Australia. This type of data collection is called a _____.
Census
A smaller group selected from a population for study is called a _____.
Sample
Data that can be counted or measured using numbers is called _____ data.
Numerical data
Data that can be sorted into groups or labels is called _____ data.
Categorical data
When every member of a population has an equal chance of being chosen, the sample is called _____.
Random
A school wants to know exactly how many students travel by bus and surveys all students. Is this a sample or a census?
Census
A researcher surveys 200 of the 5000 shoppers who visit a shopping centre. The 200 shoppers are called the _____.
Sample
Classify: Number of children in a family.
Numerical discrete
Classify: Favourite football team.
Categorical nominal
Choosing names from a hat is an example of what type of sampling?
Random sampling
A census provides exact information because it includes this group.
The entire population
A sample is generally preferred over a census because it is quicker and _____.
Cheaper or less expensive
Classify: Height of a student.
Numerical continuous
Classify: School grades of Excellent, Sound, Basic.
Categorical ordinal
A survey about school uniform uses only members of the netball teams. Is this representative or biased?
Biased
Name one disadvantage of conducting a census.
It is time-consuming, complex or expensive
The larger a sample is, the more likely it is to be ____ of the population.
Representative
Classify: Shoe size.
Numerical discrete
Explain the difference between nominal and ordinal data.
Ordinal data has an order; nominal data does not
A survey selects one student from every class using a random number generator. Representative or biased?
Representative
A council needs the exact number of retired residents in an area to plan services. Which method should be used and why?
Census because an exact count is required
A principal wants student opinions about a new timetable. Surveying all students is impractical. Which method should be used and why?
A sample because it is faster and more practical
Classify each as discrete or continuous: body temperature, number of pets, rainfall amount, number of goals scored.
Continuous, discrete, continuous, discrete
Classify each: hair colour, race finishing position, film classification, suburb of residence.
Nominal, ordinal, nominal, nominal
A researcher surveys only people who volunteer online. Identify the problem with this sample.
It is biased because not everyone had an equal chance of being selected