Lecture 5 2011 Inked snow affected

Lecture 5 2011 Inked snow affected - 1 II. Descriptive...

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Unformatted text preview: 1 II. Descriptive Statistics 1. Variables and Data A. A. Organizing Organizing Data (Chapter 2) Data (Chapter 2) a. Variable : b. Data : c. Types of Variables and Data d. Data Measurement Levels 2. Organizing Data a Arrays a. Arrays b. Grouped Data Tables 3. Graphs and Charts Grouped Data Table Grouped Data Table Monthly phone bills for ResEc 211 Students, 2011. Phone Bill Frequency Relative Frequency Cumulative Frequency Less than $30 57 0 277 57 Less than $30 57 0.277 57 $30 < $60 77 0.374 134 $60 < $90 36 0.175 170 $90 < $120 18 0.087 188 $120 < $150 9 0.044 197 $150 < $180 3 0.015 200 $180 < $210 4 0.019 204 $210 < $240 1 0.005 205 $240 and Over 1 0.005 206 Totals 206 1.000 2 3. Graphs and Charts a. a. Histograms Histograms Numeric horizontal axis. Graph of a distribution The bars touch! Histogram Histogram quantitative data quantitative data, , any any value in a value in a range is range is possible, so the bars touch. possible, so the bars touch. a. Histograms Distribution of ResEc 211 Student Phone Bills, 2011. 30 40 50 60 70 80 90 elativeFrequency 10 20 0 < $30 $30 < $60 $60 < $90 $90 < $120 $120 < $150 $150 < $180 $180 < $210 $210 < $240 $240 and Over R Monthly Phone Bill ($) 3 a. Histograms Whats illustrated? 30 40 50 60 70 80 90 RelativeFrequency Distribution of ResEc 211 Student Phone Bills, 2011. 0.30 0.35 0.40 cy Distribution of ResEc 211 Student Phone Bills, 2011. 10 20 0 < $30 $30 < $60 $60 < $90 $90 < $120 $120 < $150 $150 < $180 $180 < $210 $210 < $240 $240 and Over R Monthly Phone Bill ($) 0.00 0.05 0.10 0.15 0.20 0.25 0 < $30 $30 < $60 $60 < $90 $90 < $120 $120 < $150 $150 < $180 $180 < $210 $210 < $240 $240 and Over RelativeFrequenc Monthly Phone Bill ($) PRS 1: What proportion of ResEc 211 students paid less than $60 for their monthly telelphone bill....
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This note was uploaded on 12/08/2011 for the course ECON 211 taught by Professor Daniellass during the Spring '11 term at UMass (Amherst).

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Lecture 5 2011 Inked snow affected - 1 II. Descriptive...

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