Describing sampling methods
Like a "lottery"
What is simple random sampling
Describes something about a population.
What is parameter?
TRUE or FALSE: A Parameter is a numerical measure that describes an aspect of a sample.
What is False?
The entire group that you want to draw conclusions about.
What is population?
TRUE or FALSE: A nominal variable is a qualitative variable with no natural ordering.
What is True?
A sampling method where the population is separated into groups, typically a large population, and a random selection of groups are made.
What is cluster sample
A researcher surveys only the students sitting in the front row of a classroom. Is this a good sample? Why or why not?
What is no? It is a convenience sample.
Describes something about a sample.
What is a statistic?
The year a movie was released — qualitative or quantitative? Discrete or continuous?
What is quantitative and discrete?
A school wants to know student opinions on a new lunch menu. They randomly select 50 students from each grade level. What sampling method is this, and why is it effective?
What is Stratified sampling? Ensures each grade level is fairly represented.
Qualitative data that is ranked by "order"
What is ordinal data
The specific group that you will collect data from.
What is Sample?
A researcher divides a city into neighborhoods, randomly selects 5 neighborhoods, and surveys every household in those neighborhoods. What sampling method is this?
What is cluster sampling?
Quick, easy, and inexpensive... this sampling technique lacks a random selection which may not generalize to the target population.
What is Convenience Sampling?
Two subgroups of the variable Quantitative.
What is Discrete and Continuous?
In a study of 68,000 workers, 62% of criminal justice majors said they were underemployed. Is this a parameter or a statistic?
What is statistic?