welcome to mm207 - statistics! unit 2 seminar monday 8:00 – 9:00 pm et professor: dan watson good...
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Welcome to MM207 - Statistics!Unit 2 Seminar
Monday8:00 – 9:00 pm ET
Professor: Dan WatsonGood Evening Everyone!
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Organizing Data: Graphs and Tables
• Common GraphsHistogram Circle graphs (Pie chart)Bar graphs Time series graphPareto chart Stem-and-leaf plot
• Excel templates for creating Histograms and Pie Charhttps://docs.google.com/leaf?id=0B0ucIB81tO7DYjg0YjQzNDAtMDA2Yy00YzMzLWE1NzAtMTdlMjQ3OTJkY2Nm&sort=name&layout=list&num=50
• Additional resources available in the classroom by clicking on:
Unit 11 -> Web Resources
Analysis Toolpak
Histogram Add-in
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Creating a Histogram in Excel
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Creating a Histogram in ExcelEnter in Left and Right Endpoints for ClassesCalculate Midpoint by using the formula =(A4+B4)/2. Copy this cell (ctrl+c), Highlight the remaining midpoint cells and select paste (ctrl+v).
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Creating a Histogram in ExcelEnter in Frequency for Column DCalculate Relative Frequency by using the formula =(D4)/50. Copy this cell (ctrl+c), Highlight the remaining relative frequency cells and select paste (ctrl+v).
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Creating a Histogram in ExcelClick on ‘Insert’ -> ‘Chart’ -> ‘Column’Highlight the Frequency and select appropriate histogram
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Creating a Histogram in ExcelTo set the x axis, right click on the chartand select ‘Select Data’, click on ‘Category (x) axis labels, and highlight theMidpoints
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Creating a Histogram in ExcelTo make the bars touch each other, right click on one of the barsand select ‘Format Data Series’Set the Gap Width to 0%
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Creating a Histogram in ExcelFinished Product! -> Copy and Paste Histogram into your Word Document
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Creating a Pie Chart in Excel
Creating a Pie Chart is the same procedureClick on ‘Insert’ -> ‘Chart’ -> ‘Pie’
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Mode, Median, and Mean Summary
• Mean: The mean is the arithmetic average of the data set. (page 67) • Median: The median is the central value of an ordered data set. (page 68)• Mode: The mode of a data set is the value that occurs most frequently.
(page 69)
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Mode, Median, and Mean Summary
• Mean: The mean is the arithmetic average of the data set. (page 67)
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Mode, Median, and Mean Summary
• Median: The median is the central value of an ordered data set. (page 68)
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Mode, Median, and Mean Summary
• Mode: The mode of a data set is the value that occurs most frequently. (page 69)
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Mode, Median, and Mean Summary
• Mode: The mode of a data set is the value that occurs most frequently. (page 69)
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Range Summary
• Range is the difference between the largest and smallest values in a data set
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Sample Standard Deviation
• The variance is a measure of how far a set of numbers are spread out from each other
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Sample Standard Deviation
• The sample standard deviation gives you how the data is spread about the sample mean.
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Sample Standard Deviation• The sample standard deviation gives you how the data is
spread about the sample mean.
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Empirical Rule
• Empirical Rule for data with a bell-shaped distribution, the standard deviation has the following characteristics.
1. About 68% of the data lies within one standard deviation of the mean.
2. About 95% of the data lies within two standard deviations of the mean.
3. About 99.7% of the data lies within three standard deviations of the mean.
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Empirical Rule
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Empirical Rule