Statistics
Collection of methods for planning experiments, obtaining data, organizing, summarizing, presenting, analyzing, interpreting, and drawing conclusions based on data.
data
Facts and statistics collected together for reference or analysis
population
Entire group being studied
sample
A selection from a larger population that is statistically representative of that population.
statistics
Collection of methods for planning experiments, obtaining data, organizing, summarizing, presenting, analyzing, interpreting, and drawing conclusions based on data. Numerical summary
descriptive statistic
Consists of organizing and summarizing data
inferential statistic
extending our results of our summary to the popuation
parameter
NUMERCIAL SUMMARY OF POPULATION
variable
A characteristics of the individual within the population
qualitative variable
A characteristic that is defined by its presence or absence in a category categorical
quantitative variable
a characteristic that can be measured numerically
discrete variable
quantitative variable
has seperate, indivisibly categories, no values can exist between two neighboring categories added or subtracted1,2,3, (values result)
frame
a list of all the individuals within the population
Hi
Alternative Hypothesis
Ho
Null Hypothesis
Seed
Initial point for the generator to start creating random numbers.
Stratified sample
A sample drawn in such a way that known subgroups within a population are represented in proportion to their numbers in the general population layers 2 step process Most popular no overlapping
Systemic sample
select every _nth individual from the population
Cluster sample
Is obtained by selecting all individuals within a randomly selected collection or group of individuals Select group, everyone a sample, defines a group
Convenience sample
Choosing a sample because it is convenient. If you survey everyone on your soccer team who attends tonight's practice, you are surveying a convenience sample. Easily obtained
Self Selected
individuals choose to be in the study, they volunteer to participate in the survey
Voluntary Response
also self selected, individuals decide to participate
Bias
A particular preference or point of view that is personal, rather than scientific. If RESULTS OF SAMPLE ARE NOT REPRESENATIVE OF POPULATION