Ch 3 - Displaying Data Flashcards
frequency distribution
a distribution in which the values of the dependent variable are tabled or plotted against their frequency of occurrence
stem-and-leaf display
graphical display presenting original data arranged into a histogram
exploratory data analysis (EDA)
a set of techniques developed by TUkey for presenting data in visually meaningful ways
leading digits (most significant digits)
leftmost digits of a number
stem
vertical axis of display containing the leading digits
trailing digits (less significant digits)
digits to the right of the leading digits
leaves
horizontal axis of display containing the trailing digits
histogram
graph in which a rectangle is used to represent frequencies of observations w/in each interval
real lower limit
the point halfway btwn the bottom of one interval; “the smallest value that would be classes as falling into that interval”
real upper limit
the point halfway btwn the top of one interval and the bottom of the one above it; “the largest value that would be classed as falling into that interval”
midpoint
center of the interval; average of the upper and lower limits
outlier
an extreme point that stands out from the rest of the distribution
line graph
aka polygon graph; a graph in which the Y values corresponding to different values of X are connected by a line; dots are sequentially connected to each other by straight lines
bar graph
a graph in which the frequency of occurrence of different values of X is represented by the heigh of a bar
symmetric
having the same shape on both sides of the center
