Chapter 1 Flashcards
Divide the population into groups(clusters). Randomly select SOME groups and every member of the chosen groups are in the sample.
Cluster Sample
A first subject is picked randomly. Then each nth in a sequence
Systematic Sample
Choose subjects that are easily accessible. Not very random - such as having a classroom poll
Convenience Sample
Every sample of n(any #) subjects is equally likely to be chosen.
Simple Random Sample
Numbers that are categorical such as social security numbers and football jersey numbers for a team.
Nominal
The collection of data of all members of a population.
Census
Type of study that involves applying a treatment to the subjects to observe the results.
Experiment
Data can be arranged in order, but arithmetic has no meaning. Such as 1st place winner to 10th place.
Ordinal
There is a natural zero, which means ‘none’ and ratios have meaning. Such as comparing a class time of 75 minutes to a class time of 150 minutes and or heights of U.S. adults in inches.
Ratio
A numerical measurement for a population.
Parameter
Date for which there is finitely many or countably infinitely many.
Discrete Numerical Data
Data for which the values comes from an interval.
Continuous Numerical Data
A numerical data such as counts or measurements.
Quantitative Data
Dividing the population into groups(strata). Randomly select from EACH group.
Stratified Sample
Data such as labels or categories. Sometimes numbers.
Categorical Data
There is no natural zero, IE zero doesn’t mean ‘none’, ratios are meaningless, but differences have meaning. Such as temperature in Fahrenheit, 0 is also a number on a scale.
Interval
When a researcher puts out a request for members of a population to join a sample, and people decide whether or not be in it.
Voluntary Response Sample
A numerical measurement for a sample.
Statistic
The Science of planning studies or experiments, obtaining data, organizing data, and drawing conclusions.
Statistics
Type of study that involves observing or measuring certain characteristics without any treatment applied.
Observational Study
A collection of observations, such as measurements, genders, and survey responses.
Data
A subcollection of a population.
Sample
The complete set of measurements being considered.
Population
