1. population The entire number of items in a large group
2. sample a subset of the population
3. statistical infer- the process of using data from a sample to gain informa-
ence tion about the population
4. descriptive sta- uses numerical and graphical methods to explore data
tistics (e.g., look for patterns)
compiled summary of the data analysis in numerical, tab-
ular, or graphical form
5. histogram summary count of items in each category in a single
variable, in a tabular or graphical view
6. average used as a measure to determine a central value or location
from the data used
7. index number most widely utilized numerical descriptive statistic
- typically a compilation of several data sources and
weighted to provide a consistent review of a measured
variable
8. experimental the researcher manipulates one of the variables and tries
study to determine how the manipulation influences other vari-
ables
9. observational researcher collects information not by influencing the vari-
study ables in the study, but by simply observing the variable in
action (active or passive)
10. data things about which information can be collected and ana-
lyzed (people, numerical information, geographical areas,
etc.)
11. data set an rectangular array of information that contains the vari-
ous categories of data collected for a specific study
12. element
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