Chapter 2 Flashcards
A bar graph for quantitative data in which the horizontal scale represents the classes and the vertical scale represents the frequencies. The heights of the bars correspond to the frequency values, and the bars touch - NO GAPS(unless there are gaps in the data)
Histogram
Another bar chart for categorical data where the bars are arranged in ascending or descending order according to frequencies
Pareto Chart
These have the same shape as a histogram with frequency, but the frequencies change to relative frequency percents
Relative Frequency Histogram
Uses line segments connected to points located directly above class midpoint values
Frequency Polygon
A line graph that depicts cumulative frequencies, just as the cumulative frequency table lists cumulative frequencies
Ogive
The scale from 0-100 could be compressed then continue normally form 100-400
Compressed Scale
Represents data by separating each value into two parts: the stem and the leaves
Stem-and-leaf Plot
Consist of a graph in which each data value is plotted as a point along a scale of values. Dots represent the same values that are stacked, so they also preserve original data values.
Dot Plots
A plot of the paired (x,y) data to measure the correlation or association between two quantitative variables
Scatter Plots
Has one apparent peak
A unimodal distribution/histogram
Histogram has two apparent peaks
Bimodal
A histogram that doesn’t appear to have any mode and in which all the bars are approximately the same height is called
Uniform
If you can fold the histogram along a vertical line through the middle and have the edges match pretty closely, the histogram is
Symmetric Distributions
The (usually) thinner ends of a distribution are called tails. If one tail stretches out farther than the other, the histogram is said to be
Skewed Distributions
Contains slices of the pie that are proper proportions if the total categorical data
Pie Chart
