Stats: What is Statistics? Vocab

Statistics

study of collecting, organizing, analyzing, & interpreting info from data

Individuals

ppl in study (can be objects)

Variables

characteristic of the individual to be measured/observed (what abt the ppl/object are we studying?)

Quantitative Data Variable

value or numerical measurement for w/ operations such as addition/averaging makes sense

Qualitative Data Variable

describes individual by placing it into a category/group

Population data

data from every individual of interest

Sample data

data from some of individual interest

Sample Statistics

numerical measure, describes an aspect of a sample

Population parameter

numerical measure, describes an aspect of the population

Nominal level of measurement

applies to data that have names, labels, or categories

Ordinal level of measurement

applies to data that can be arranged in order. however, diff btwn data values either cannot be determined or are meaningless

Interval Level of Measurement

applies to data that can be arranged in order. in addition, diff btwn data values are meaningful (no true “0” starting point)

Ratio Level of Measurement

applies to data that can be arranged in order. in addition, both diff btwn data values & ratio of data values are meaningful. data of the ratio level have a true “0”