Stats Lecture 2
Stats Lecture 2 k300
Popular in Elementary Statistics
Popular in Stats
This 1 page Class Notes was uploaded by Kaley Manspeaker on Saturday January 30, 2016. The Class Notes belongs to k300 at Indiana University Purdue University - Indianapolis taught by Curtis Ramsey in Spring 2016. Since its upload, it has received 34 views. For similar materials see Elementary Statistics in Stats at Indiana University Purdue University - Indianapolis.
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Date Created: 01/30/16
Elementary Statistics Lecture 2 Definitions: • Data collected in original form is called raw data • A frequency distribution is the organization of raw data in table form, using classes and frequencies • Categorical frequency distribution is nominal or ordinal level data that can be placed in categories • Grouped frequency distributions are used when the range of data is large • The smallest and largest possible data values in a class are the lower and upper class limits • Boundary-‐ line between limits Most common types of graphs for data: Histogram, Frequency Polygon, Ogive, Bar graphs, Pie charts, Stem and Leaf plot, and Scatter plot. • Histogram: Frequency and boundary of the classes • Frequency Polygon: Use lines that connect points plotted for the frequencies at the class midpoints • Ogive: Represents cumulative frequencies • Relative frequency graphs: proportions are used instead of frequencies • Scatter plot: Order pairs of data and see if relationship exists between two variables Shapes of Graphs: Bell-‐shaped, J-‐shaped, Uniform, and Reverse J-‐shaped • Class Midpoint: Lower class and upper class divide by two • Class Width: Upper-‐Lower