Chapter 2 Flashcards
(11 cards)
Frequency Table
Organizes collected data in table form using categories (or classes) and frequencies
Organize groups by the same name
Frequency –> the amount of time it appears
Relative Frequency Table
(copy paste link in a new tab to see photo example) https://prnt.sc/WE7EE3QbgyXK
organizes raw data in table form using categories/calsses and proportions/percentages
relative frequency = frequency/total of everything
What is qualitative data best shown on?
equally spaced bar graph or pie chart
Contingency Table
data where each row represents categories of one of the variables and each column represents categories of the variables
Class Width
(copy paste link in a new tab to see photo example) https://prnt.sc/oMLirrotC8t7
Equation:
(largest data value - smallest data value)
———————————–
number of classes
always round up! (to the next whole number, tenth, hundreth, etc)
Class Width Example Question
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Computing class boundaries
(copy paste link in a new tab to see photo example) https://prnt.sc/qwgoOsCEhBut
If the class width is a…
whole number –> subtract 0.5 from smallest value in data set
tenth –> subtract 0.05 from smallest value in data set
hundreth –> subtract 0.005 from smallest value in data set
What type of graph is quantitative data best displayed on?
Histogram
Skewed Graphs
(copy paste link in a new tab to see photo example)
Stem-and-Leaf Plot
a graph that separates data into a “stem” and “leaves”. Columns must be aligned and put in numerical order. A title and legend must be included
(copy paste link in a new tab to see photo example) https://prnt.sc/FeXvU4OpUKKR
Scatter Plot
a graph that plots ordered pairs from two varaibles where a relationship is suspected
(copy paste link in a new tab to see photo example)
