Ch. 2 Flashcards
A grouping of qualitive data into mutually exclusive and collectively exhaustive classes showing the number of observations in each class
Frequency Table
A graph that shows qualitative classes on the horizontal axis and the class frequencies on the vertical axis. Most common
Bar Chart
A chart that shows the proportion of percentage that each class represents of the total number of frequencies
Pie Chart
A grouping of quantitative data into mutually exclusive and collectively exhaustive classes showing the number of observations in each class.
Frequency Distribution
What are the steps for building a Frequency Distribution
- Decide on the number of classes
- Determine the class interval
- Set the individual class limits
- Tally the data into classes and determine the number of the observations in each class
Recipe for determining the number of classes
2 to the k rule
The smallest number “k” where 2 raised to the k is greater than the number of observations
How to determine the class interval
i greater than or equal to the Maximum value - minimum value divided b k
What do i and k stand for
i = class interval and k = the number of classes
The number of observations in each class
Class Frequency
A graph similar to a bar chart in which the classes are marked on the horizontal axis and the class frequencies on the vertical axis. The bars are adjacent to each other and easily provide visual representation of a frequency distribution
Histogram
Shows the shape of a distribution and is similar to a histogram. Consist of line segments connecting the point formed by the intersections of class midpoints and class frequencies.
Frequency Polygon
What’s the advantage of a frequency polygon
Allows easy comparison of two or more frequency distributions
value or values that occur most often.
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