– Time-Series Plot
– Run Chart – Normality Test
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Pareto
Purpose:
Focus on the most significant problem or cause Stats > Quality Tools > Pareto Chart
Minitab Basics : Window
• • • Tool Bar Menu Bar Session Window: • Analytical Output Multiple (max Four) Interactive Windows. Only one can open at a time. Windows can be saved separately.
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Minitab Basics
To Transfer Data from Worksheet to Session Window: Go to Data > Display Data
Month Jan-02 Feb-02 Mar-02 Apr-02 May-02 Jun-02 Jul-02 Aug-02 Sep-02 Oct-02 Nov-02 Dec-02 Working_days 22 22 24 23 24 21 17 23 23 24 19 23 Month Jan-03 Feb-03 Mar-03 Apr-03 May-03 Jun-03 Jul-03 Aug-03 Sep-03 Oct-03 Nov-03 Dec-03 Working_days 19 18 26 20 17 22 25 22 23 20 25 24 Month Jan-04 Feb-04 Mar-04 Apr-04 May-04 Jun-04 Jul-04 Aug-04 Sep-04 Oct-04 Nov-04 Dec-04 Working_days 23 23 24 19 18 25 24 26Graphs
Cancel
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Previous Brushed Row
Next Brushed Row Last Dialog Box Session Window Data Window
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Commands can also be accessed from drop down menus or Hot keys.
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Histogram
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Minitab Basics
To Change Data type: Go to Data > Change Data Type Change Data Type:
Two 25 6.1 94.1
Four 12 2.9 97.1
Other 12 2.9 100.0
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Percent
Maximum Contributor s
80 60
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Solving Using Minitab
•Stat Basic Statistics Display Descriptive Statistics.
1.
Double- click C1 to be chosen as “Variables”
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Solving Using Minitab
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Graphical Analysis
– Pareto Chart – Histogram – Dot Plot – Box Plot – Scatter Plot – Matrix Plot – Marginal Plot
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Minitab Basics : Toolbar
Data Window Toolbar
Open File Save File Print Window Insert Cells Insert Rows Insert Columns Move Columns Clear Cells Manage Graphs
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Solution For the data set below, the values for various parameters is 2, -2, 0, 1, 5, 4, 3, 1, 0, -2, -4, -3 ,-2, -2, 0. The sorted data is -4, -3, -2, -2, -2, -2, 0, 0, 0, 1, 1, 2, 3, 4, 5.
Range Standard Deviation
Variance Quartile
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Recall
Statistics which defines the dispersion:
Pareto Chart of Zone
400 100
300
Count
200 40 100 20 0
0 Zone Count Percent Cum %
One 132 32.4 32.4
Three 102 25.0 57.4
Five 52 12.7 70.1
Eight 41 10.0 80.1
Six 32 7.8 88.0
Basic Statistics : Dispersion
Quartile
First quartile, Q1 = a value corresponding to 25% Second Quartile (median), Q2 = a value corresponding to 50% Third Quartile, Q3 = a value corresponding to 75% Inter quartile Range, IQR = Q3-Q1
to Numeric
Manip > Change Data Type > Numeric
to Date/Time
Manip > Change Data Type > Text
to
Date/Time
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2.
Go to Statistics to select the required values and click OK
Find the answers displayed in the Session window.
3.
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Example - Calculate quartile and IQR for the data: 1, 10, 20, 4, 9, 5, 4, 3
Q2 (Median) = 4.5
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3
4
4
5
10
9
20
IQR = 7.5
Q1 = 3.25
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Q3 = 10.75
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Minitab Basics • Data > Code > Text to Numeric
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Basic Statistics
The most common ones are: Count Average Minimum Maximum Sum Percent Defects • Statistics which defines the location: