Stats Chapter 2 Flashcards
(13 cards)
data that is not organized
raw data
tables
graphes
numerical summaries
ways to organize data
lists each category of data and the number of occurrences for each category of data
frequency distribution
proportion or percent of observations within a category
relative frequency
lists each category of data with the relative frequency
relative frequency distribution
bar graph where the bars are drawn in decreasing order of frequency of relative frequency
Pareto chart
circle divided into sectors. Each sector represents a category of data. The area of each sector is proportional to the frequency of the category.
pie chart
categories into which data are grouped. When a data set consists of a large number of different discrete data values or when a data set consists of continuous data, we must create ____ by using intervals of numbers
classes
A ____ uses digits to the left of the rightmost digit to form the ____. Each rightmost digit forms a ____
stem and leaf plot, stem, leaf
displays the aggregate frequency of the category. For discrete data, it displays the total number of observations less than or equal to the category. For continuous data, it displays the total number of observations less than or equal to the upper class limit of a class
cumulative frequency distribution
displays the proportion or percentage of observations less than or equal to the category for discrete data and the proportion or percentage of observations less than or equal to the upper class limit for continuous data
cumulative relative frequency distribution
time series data
if the value of a variable is measured at different points in time
obtained by plotting the time in which a variable is measured on the horizontal axis and the corresponding value of the variable on the vertical axis. Line segments are then drawn connecting the points
time-series plot
