Equations
A subset of the population
What is a sample?
Data that is numeric.
What is quantatitive data?
Easy, cheaper, more efficient.
What are reasons for using a sample.
Data collection techniques.
What are survey, simulation, observation, or experiment?
The name of the hurricane that hit SC & NC coast.
What is Florence?
The science of conducting studies to collect, organize, summarize, analyze, and draw conclusions from data.
What is statistics?
Data that can be measured.
What is continuous data?
Numbering your population and drawing the numbers at random.
What is simple random sample?
The group that receives no treatment.
What is the control group?
Can I just pick the objects to be in my sample?
What is no?
A characteristic that can assume different values.
What is a variable?
Describe the variable 2 ways:
Hair Color
What is qualitative and nominal?
Reduces bias.
What is randomization?
The variable that inteferes with the other variables.
What is a confounding variable?
Name 3 sources of bias.
What are: non response, convenience, response, under coverage, wording, voluntary.
Or any error from researcher, respondent or sampling method.
The two branches of statistics.
What is: descriptive and inferential?
Describe the variable 3 ways:
Temperature.
What is quantitative, interval and continuous?
Describe cluster sampling.
What is dividing population into groups, randomly selecting some groups, take all of the items in the groups selected?
The problem with selecting the first 10 names on the roster to create your sample.
What is causes bias, not representative?
The problem with selecting the first 20 men who volunteer to answer a survey?
What are creates bias, voluntary response bias, or not representative, not random selection.
The basis of inferential statistics.
What is probability?
The highest level of measurement for quantitative data.
What is ratio?
Describe stratified Sampling.
What is dividing the population into similar groups, randomly selecting some from each group?
Weaknesses of Simple Random Sample.
What is variability, may not be representative?
The 3 key principles of experimental design.
What is replication, control, randomization.