IT Cadre 2006 USING PARETO CHARTS IN DATA ANALYSIS.

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Transcript of IT Cadre 2006 USING PARETO CHARTS IN DATA ANALYSIS.

  • USING PARETO CHARTSIN DATA ANALYSIS

    Chart1

    0.44736842110.4473684211

    0.26315789470.7105263158

    0.15789473680.8684210526

    0.10526315790.9736842105

    0.02631578951

    Spelling Rules

    Number of Errors by Rule

    Cummulative Percentages

    Pareto Chart of Missed Spelling Rules

    Spellling Pareto Chart 2

    0.44736842110.4473684211

    0.26315789470.7105263158

    0.15789473680.8684210526

    0.10526315790.9736842105

    0.02631578951

    &A

    Page &P

    Percentage

    Cumulative Percentage

    Spelling Rule

    Percentage of Errors

    Cumulative Percentage

    Misspelled Words by Rule

    Sheet1

    CategoryFrequencyPercentageCumulative Percentage

    Silent E1745%45%

    I before E1026%71%

    Plurals616%87%

    Two Vowels Together411%97%

    Dropping Y13%100%

    38100%

    Spelling Pareto Chart

    170.4473684211

    100.7105263158

    60.8684210526

    40.9736842105

    11

    Frequency

    Cumulative Percentage

    Sheet2

    CategoryFrequencyPercentageCumulative Percentage

    Silent E1745%45%

    I before E1026%71%

    Plurals616%87%

    Two Vowels Together411%97%

    Dropping Y13%100%

    38

    Sheet3

  • PURPOSEUsed to identify events that occur most frequently. User ranks the events on a spreadsheet according to their frequency from greatest to least. For example, on a spelling test, words could be grouped according to the common rule that they follow. Rules are then ranked by the number of errors that occurred.

  • APPLICATIONUseful in identifying the most commonly missed rule and in assisting in targeting instruction.By targeting instruction, student achievement can be increased.

  • Pareto Charts help you target areas for instruction with the 80/20 rule.

    Chart1

    0.44736842110.4473684211

    0.26315789470.7105263158

    0.15789473680.8684210526

    0.10526315790.9736842105

    0.02631578951

    Spelling Rules

    Number of Errors by Rule

    Cummulative Percentages

    Pareto Chart of Missed Spelling Rules

    Spellling Pareto Chart 2

    0.44736842110.4473684211

    0.26315789470.7105263158

    0.15789473680.8684210526

    0.10526315790.9736842105

    0.02631578951

    &A

    Page &P

    Percentage

    Cumulative Percentage

    Spelling Rule

    Percentage of Errors

    Cumulative Percentage

    Misspelled Words by Rule

    Sheet1

    CategoryFrequencyPercentageCumulative Percentage

    Silent E1745%45%

    I before E1026%71%

    Plurals616%87%

    Two Vowels Together411%97%

    Dropping Y13%100%

    38100%

    Spelling Pareto Chart

    170.4473684211

    100.7105263158

    60.8684210526

    40.9736842105

    11

    Frequency

    Cumulative Percentage

    Sheet2

    CategoryFrequencyPercentageCumulative Percentage

    Silent E1745%45%

    I before E1026%71%

    Plurals616%87%

    Two Vowels Together411%97%

    Dropping Y13%100%

    38

    Sheet3

  • HOW TO CREATE A PARETO CHART SPREADSHEET

    Select the data by highlighting it.

    Click Data on the menu bar.

    Click Sort.

  • Sort the data by the Frequency column.

    Choose Descending orderPARETO SPREADSHEET DIRECTIONS

  • Use item analysis to create a spreadsheet showing the frequency of each occurrence.(This example shows errors.)

    Use AUTO SUM (Click) to total the column. Press enter after the column is selected.

    PARETO SPREADSHEET DIRECTIONS

  • Next, create columns for Percentage and Cumulative Percentage.Your next step will be to create formulas to figure the Percentage and the Cumulative Percentage. See next slide.PARETO SPREADSHEET DIRECTIONS

  • CREATING FORMULAS FOR PARETA CHARTSelect the first cell under PercentageClick SUM. (EXCEL will automatically choose cells. You need to override it by typing the correct formula to get your data.)Type in the highlighted area (B2). The formula you need is (B2/$B$8). This is the first cell in your frequency column divided by the total number of events in your frequency column. Press ENTER.PARETO SPREADSHEET DIRECTIONS

  • Next, you want to auto fill the column so you dont have to rewrite the formula in each cell.Select the first cell under Percentage, and move your mouse to the small black square at the bottom-right corner to get the double arrow cross. Click and drag down to the bottom of the column.PARETO SPREADSHEET DIRECTIONS

  • Next, you want to auto fill the Cumulative Percentage column so you dont have to rewrite the formula in each cell.Select the first cell under Cumulative Percentage (D2) In the Formula Bar type =SUM($C$2:C2) (the first cell of the Percentage results) and press ENTER.Select the results in D2, find the double cross arrow, click and drag down to the bottom of the column.PARETO SPREADSHEET DIRECTIONS

  • Now that you have your data, its time to create your Pareto chart.

  • To create a chart, you need to select the data you want displayed on the chart. You want to select the columns labeled Category, Percentage, and Cumulative Percentage. Click on the first cell (A1) and drag down to the bottom. Then hold down the CONTROL key and click and drag the other two columns. PARETO CHART DIRECTIONS

  • While the columns are highlighted, click the Chart Wizard iconClick on Custom TypeChoose line-column, and click Next.PARETO CHART DIRECTIONS

  • Click NextPARETO CHART DIRECTIONS

  • On the Titles Tab, enter Chart Title and Axis titles

    PARETO CHART DIRECTIONS

  • Click on the Axes tab.Under Primary axis, Category, and Value (Y) axis should be checkedUnder Secondary axis, select the Value (Y) axis.Click NextPARETO CHART DIRECTIONS

  • PARETO CHART DIRECTIONS

    Select where you want to place your chart and give it a title.

  • This is what your chart should look like now. PARETO CHART DIRECTIONS

    Chart1

    0.44736842110.4473684211

    0.26315789470.7105263158

    0.15789473680.8684210526

    0.10526315790.9736842105

    0.02631578951

    Spelling Rules

    Number of Errors by Rule

    Cummulative Percentages

    Pareto Chart of Missed Spelling Rules

    Spellling Pareto Chart 2

    0.44736842110.4473684211

    0.26315789470.7105263158

    0.15789473680.8684210526

    0.10526315790.9736842105

    0.02631578951

    &A

    Page &P

    Percentage

    Cumulative Percentage

    Spelling Rule

    Percentage of Errors

    Cumulative Percentage

    Misspelled Words by Rule

    Sheet1

    CategoryFrequencyPercentageCumulative Percentage

    Silent E1745%45%

    I before E1026%71%

    Plurals616%87%

    Two Vowels Together411%97%

    Dropping Y13%100%

    38100%

    Spelling Pareto Chart

    170.4473684211

    100.7105263158

    60.8684210526

    40.9736842105

    11

    Frequency

    Cumulative Percentage

    Sheet2

    CategoryFrequencyPercentageCumulative Percentage

    Silent E1745%45%

    I before E1026%71%

    Plurals616%87%

    Two Vowels Together411%97%

    Dropping Y13%100%

    38

    Sheet3

  • Now, you need to format the left and right Y axes.Right click on a number on the right-hand Y axis.Click on Format Axis PARETO CHART DIRECTIONS

  • Select Scale.Change the Maximum value to 1.Click OK.REPEAT with the left Y axisPARETO CHART DIRECTIONS

  • CONGRATULATIONS, YOU HAVE JUST CREATED YOUR FIRST PARETO CHART!

    Chart1

    0.44736842110.4473684211

    0.26315789470.7105263158

    0.15789473680.8684210526

    0.10526315790.9736842105

    0.02631578951

    Spelling Rules

    Number of Errors by Rule

    Cummulative Percentages

    Pareto Chart of Missed Spelling Rules

    Spellling Pareto Chart 2

    0.44736842110.4473684211

    0.26315789470.7105263158

    0.15789473680.8684210526

    0.10526315790.9736842105

    0.02631578951

    &A

    Page &P

    Percentage

    Cumulative Percentage

    Spelling Rule

    Percentage of Errors

    Cumulative Percentage

    Misspelled Words by Rule

    Sheet1

    CategoryFrequencyPercentageCumulative Percentage

    Silent E1745%45%

    I before E1026%71%

    Plurals616%87%

    Two Vowels Together411%97%

    Dropping Y13%100%

    38100%

    Spelling Pareto Chart

    170.4473684211

    100.7105263158

    60.8684210526

    40.9736842105

    11

    Frequency

    Cumulative Percentage

    Sheet2

    CategoryFrequencyPercentageCumulative Percentage

    Silent E1745%45%

    I before E1026%71%

    Plurals616%87%

    Two Vowels Together411%97%

    Dropping Y13%100%

    38

    Sheet3