Vocab Flashcards
Summer Assignment
Statistics
A characteristic of a sample; Generally used to estimate the value of a population.
Individuals
People of objects that data is describing.
Variables
The characteristics measured or observed when an experiment is carried out or an observation is made.
Categorial Data/Variable
Variables that take on values that are names or labels (ex. color of a ball).
Quantitive Data/Variable
Variables that are numerical (ex. #’s)
Discrete Variable
A variable that cannot take on just ANY value between its min and max value (ex. when flipping a coin you can get an infinite amount of heads but not 2.5).
Continuous Variable
A variable that can take on any value between its min and max value (ex. if someone has to weigh 150-250 lbs. there can be any value between those limits).
Distribution
The set of values of a set of data, possibly grouped into classes, together with their frequencies or relative frequencies.
Frequency Table
A table that shows frequency counts for a categorical variable.
Relative Frequency Table
A table that shows relative frequencies for different categories of a categorical variable.
Bar Graph
Columns and rows plotted on a graph.
Pie Chart
A graph shaped like a circle with pie-like “slices”
Stemplot
Used to display quantitive data, generally from small sets (50 or less)
Histogram
Made up of columns on a graph;
- Columns over a label meant continuous, quantitative variables
- The height indicates the size defined by the column label.
Difference between bar graph and histogram
-Bar compares discrete or categorical values (gaps)
-Histogram depicts the frequency distribution of variables in a dataset. (NO GAPS)
