Test 1 Review Flashcards
What is a parameter?
A numerical summary of a population
What is a statistic?
A numerical summary based on a sample
What are variables?
The characteristics of the individuals in the population
If a variable does not vary, it is a ______
Constant
What type of variables allow for classification of individuals based on some attribute or characteristic?
Qualitative
What do quantitative variables provide?
Numerical measures of individuals
The measurements values of quantitative variables can be _____ _______
Added or subtracted and provide meaningful results
What is a discrete variable?
A variable that has either a finite number of possible values or a countable number of possible values
What is a continuous variable?
A variable that has an infinite number of possible values it can take on and can be measured to any desired level of accuracy
What is the nominal measurement level?
Name only, numbers have no meaning
What is the ordinal measurement level?
Nominal and numbers have no order, but the difference between numbers have no meaning
What is an interval measurement level?
Ordinal and difference between numbers have meaning. Zero does not mean the absence of quantity. Can add and subtract.
What is the ratio measurement level?
Interval and zero means the absence of quantity. Can multiply and divide
What is the response/dependent variable?
The focus of a question in a study or experiment
