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Chapter 2 Minitab for Data Analysis. Kanchala sudtachat. Basic Command. Example 2-1: tensile 7226, 7301, 7219, 7350, 7170, 7377, 7150, 7398 Basic command Open the worksheet sample.MTW Sort the data Data-> Sort Double click on C1 tensile on the left side. - PowerPoint PPT Presentation
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Chapter 2Minitab for Data AnalysisKANCHALA SUDTACHAT
Basic CommandExample 2-1: tensile
7226, 7301, 7219, 7350, 7170, 7377, 7150, 7398
Basic command
1. Open the worksheet sample.MTW
2. Sort the data1. Data-> Sort2. Double click on C1 tensile on the left
side.3. Click in the By Column box, then
double click again on C1 tensile on the left pane. Don’t check Descending, if you want increasing.
4. Click on the circle Column(s) of current worksheet, fill in C2
Basic CommandBasic command
3. Random data1. Calc-> Random data->Normal2. Number of rows of data to
generate 100. Store in column(s): C3
3. Mean: 7274, Standard deviation: 95.6
Simple Analysis Sample mean and sample variance
1. Stat -> Basic Statistics -> Display Descriptive Statistics
In the Display Descriptive Statistics dialog box◦ Double click C3 S tensile to
Variables◦ Click Statistics dialog box
Simple Analysis Graphs-> Check Individual value plot
Display
Using Help
Dot plot1. Open worksheet Newcomb.MTJ
2. Graph -> Dotplot -> Simple -> OK
3. Double click C1 Newcomb
Stem-And-Leaf1. Open worksheet Table2-2.MTJ
2. Graph -> Stem-and-Leaf
3. Double click C1 Strength
Histogram1. Open worksheet Table2-4.MPJ
2. Graph -> Histogram -> Simple
3. In Graph variables,
Double click C1 Distance
Histogram Graph -> Histogram
-> With fit
Histogram Fix number of intervals
After obtained result of histogram
1. Double click X Scale ->
Display Edit Scale
2. Choose Binning
-> Number of intervals -> 10
Pareto
1. Stat -> Quality Tools -> Pareto Chart
2. Double click C1 Type -> Defects or attribute data in:
3. Double click C2 HullLosses -> Frequencies in:
4. Check: Do not combine
Pareto
Box PlotSingle variables
1. Graph -> Boxplots- > Simple
2. Dialog box: Boxplot – One Y, Simple1. Double click C1 Strength to Box: Graph
variables2. Click: Data View command
-> Check: Inter quartile range box, Outlier symbols -> OK -> OK
Box Plot
Comparison
1. Graph -> Boxplots- > With Groups
2. Dialog box: Boxplot – One Y, With Groups1. Double click C1 Strength to Box: Graph variables2. Double click C2 Status to Box: Categorical
variables for grouping3. Click: Data View command
-> Check: Inter quartile range box, Outlier symbols -> OK -> OK
Time Series Plots1. Graph -> Time Series Plot
-> Simple
2. Double click C1 Strength
to Box: Series: -> OK
Individual Value Plot1. Graph -> Individual Value Plot
2. Multiple Y’s -> Simple
Individual Value Plot 1. Select -> Graph variables
C1 Day1
C2 Day2
.
.
C8 Day8
2. Click -> Data View…
Individual Value Plot 1. Individual Value Plot-Data View
Check:
- Individual symbols
- Mean symbol
- Mean connect line
2. Click -> OK -> OK
Individual Value Plot
Interval Plot1. Graph -> Interval Plot
2. Multiple Y’s -> Simple
Interval Plot1. Select Day1 – Day 8
-> Graph variables:
2. Click: Data View
Interval Plot Check box
- Interval bar
- Mean symbol
- Mean connect line
Click OK -> OK
Interval Plot
Scatter Plot1. Graph -> Scatterplot…
-> with Simple
2. Dialog box: Scatterplot - Simple1. Double click C2 Pull Strength to
Y variable2. Double click C3 Wire Length to
X variable
3. Click: OK
Scatter Plot
Scatter Plot: Correlation & P- Value
1. Stat -> Basic Statistics -> Correlation…
2. Double Click: C2 Pull Strength (Response)
3. Double Click: C3 Wire Length (Control)
4. Check: Display p-values
5. Click OK
Scatter Plot: Correlation & P-Value
Correlations: Pull Strength, Wire Length
Pearson correlation of Pull Strength and Wire Length = 0.982
P-Value = 0.000
Correlations: Pull Strength, Die Height
Pearson correlation of Pull Strength and Die Height = 0.493
P-Value = 0.012
Marginal Plotswith Dot Plot
1. Graph -> Marginal Plots
-> with Dotplots
2. Dialog box: Marginal Plot with Dotplots1. Double click C1 Strength to Y variable2. Double click C3 time to X variable
3. Click: Marginal Options
4. Check: Dotplot and Y only
5. OK -> OK
Marginal Plots with Dot Plot
Matrix Plot
1. Graph -> Matrix Plots
-> Matrix of plots: Simple
OK -> OK
Matrix Plots2. Dialog box: Matrix Plot –
Matrix of Plots, Simple
Start with control variables1. Double click C3 Wire Length
-> Graph variables2. Double click C4 Die Height
-> Graph variables End with response variable3. Double click C2 Pull Strength
-> Graph variables
3. OK -> OK
Matrix Plots
Questions?