The Organization and Graphic Presentation of Data
EDP 613
Week 2
1 / 17

Basic Ideas

Distribution - All of the possible values for a variable and how often they occur

2 / 17

Basic Ideas

Distribution - All of the possible values for a variable and how often they occur

Frequency distribution - A table that displays a distribution

2 / 17

Basic Ideas

Distribution - All of the possible values for a variable and how often they occur

Frequency distribution - A table that displays a distribution

Relative frequency - How often something happens divided by all outcomes

2 / 17

Professor Salaries

Search:

	Rank	Discipline	Years Since PhD	Years of Service	Sex	Salary in USD
1	Professor	Applied	19	18	Male	139750
2	Professor	Applied	20	16	Male	173200
3	Assistant Professor	Applied	4	3	Male	79750
4	Professor	Applied	45	39	Male	115000
5	Professor	Applied	40	41	Male	141500

Showing 1 to 5 of 397 entries

Previous1 2 3 4 5…80Next

3 / 17

Frequency Distribution Table

Rank	Frequency
Assistant Professor	67
Associate Professor	64
Professor	266

4 / 17

Other Descriptive Information

Proportion - A relative frequency taken from the whole frequency and is normally between 0 and 1.

5 / 17

Other Descriptive Information

Proportion - A relative frequency taken from the whole frequency and is normally between 0 and 1.

Percentage - A relative frequency taken from the whole frequency and is normally between 0 and 100.

5 / 17

Other Descriptive Information

Proportion - A relative frequency taken from the whole frequency and is normally between 0 and 1.

Percentage - A relative frequency taken from the whole frequency and is normally between 0 and 100.

Rank	Frequency	Proportion	Percent
Assistant Professor	67	0.1687657	16.88
Associate Professor	64	0.1612091	16.12
Professor	266	0.6700252	67.00

5 / 17

Cumulative Distributions

Cumulative frequency - A table that displays the frequencies at or below a given category.

6 / 17

Cumulative Distributions

Cumulative frequency - A table that displays the frequencies at or below a given category.

Rank	Frequency	Proportion	Percent	Cumulative Proportion	Cumulative Percent
Assistant Professor	67	0.1687657	16.88	0.1687657	16.88
Associate Professor	64	0.1612091	16.12	0.3299748	33.00
Professor	266	0.6700252	67.00	1.0000000	100.00

6 / 17

Data Visualization

7 / 17

Pie Charts

discrete data Friends don't let friends use pie charts!

8 / 17

Bar Plot

discrete data

9 / 17

Histogram

continuous data

10 / 17

Line graph

continuous data

11 / 17

Special Distributions

12 / 17

Skewed left OR Negative skew

mode < median < mean

13 / 17

Skewed right OR Positive skew

mode > median > mean

14 / 17

Normal distribution

mode = median = mean

15 / 17

Remember that most of the time we're going to assume normality in this course!

16 / 17

That's it. Take a break before our R session!

17 / 17

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Tile View: Overview of Slides

The Organization and Graphic Presentation of Data
EDP 613
Week 2
1 / 17

Basic Ideas

Distribution - All of the possible values for a variable and how often they occur

2 / 17

Basic Ideas

Distribution - All of the possible values for a variable and how often they occur

Frequency distribution - A table that displays a distribution

2 / 17

Basic Ideas

Distribution - All of the possible values for a variable and how often they occur

Frequency distribution - A table that displays a distribution

Relative frequency - How often something happens divided by all outcomes

2 / 17

Professor Salaries

3 / 17

Frequency Distribution Table

Rank	Frequency
Assistant Professor	67
Associate Professor	64
Professor	266

4 / 17

Other Descriptive Information

Proportion - A relative frequency taken from the whole frequency and is normally between 0 and 1.

5 / 17

Other Descriptive Information

Proportion - A relative frequency taken from the whole frequency and is normally between 0 and 1.

Percentage - A relative frequency taken from the whole frequency and is normally between 0 and 100.

5 / 17

Other Descriptive Information

Proportion - A relative frequency taken from the whole frequency and is normally between 0 and 1.

Percentage - A relative frequency taken from the whole frequency and is normally between 0 and 100.

Rank	Frequency	Proportion	Percent
Assistant Professor	67	0.1687657	16.88
Associate Professor	64	0.1612091	16.12
Professor	266	0.6700252	67.00

5 / 17

Cumulative Distributions

Cumulative frequency - A table that displays the frequencies at or below a given category.

6 / 17

Cumulative Distributions

Cumulative frequency - A table that displays the frequencies at or below a given category.

Rank	Frequency	Proportion	Percent	Cumulative Proportion	Cumulative Percent
Assistant Professor	67	0.1687657	16.88	0.1687657	16.88
Associate Professor	64	0.1612091	16.12	0.3299748	33.00
Professor	266	0.6700252	67.00	1.0000000	100.00

6 / 17

Data Visualization

7 / 17

Pie Charts

discrete data Friends don't let friends use pie charts!

8 / 17

Bar Plot

discrete data

9 / 17

Histogram

continuous data

10 / 17

Line graph

continuous data

11 / 17

Special Distributions

12 / 17

Skewed left OR Negative skew

mode < median < mean

13 / 17

Skewed right OR Positive skew

mode > median > mean

14 / 17

Normal distribution

mode = median = mean

15 / 17

Remember that most of the time we're going to assume normality in this course!

16 / 17

That's it. Take a break before our R session!

17 / 17