Minitab® 16 Workshop

Presented by Arved Harding

Your friendly, neighborhood statistician

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Outline

A few new features Minitab® ’s Assistant Minitab® Tutorials Quality Trainer Quality Companion

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Credit where it is due.

Many slides were created by Christy Bower, a statistician at Eastman in our Applied Statistics Group.

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A few new features “Quality People” might like

Gage R&R Study (Expanded) – Include additional factors, analyze studies that are balanced or unbalanced, specify if factors are fixed or random, and more.

Compare two capability analyses to see if the process has improved. General Regression – Easily specify interaction and polynomial

terms, compute confidence intervals for regression coefficients, and more.

Export to PowerPoint and Word – Directly export your graphs and Session window output for easy reporting.

Nonlinear Regression – Model non-linear relationships between variables.

Power and Sample Size – Use seven new tools to calculate power and sample size.

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More power and sample size options

Minitab® provides power, sample size, and difference (effect) calculations for the following procedures: ·    one-sample Z ·    one-sample t ·    two-sample t ·    paired t ·    one variance test ·    two variances test ·    one-sample proportion ·    two-sample proportion ·    one-sample Poisson rate ·    two-sample Poisson rate ·    one-way analysis of variance ·    two-level factorial designs ·    Plackett-Burman designs ·    General Full Factorial designs

You can also estimate the sample size you need to obtain a specific margin of error using Sample Size for Estimation.

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Sample size for estimation

Parameters include:•Mean•Standard deviation•Variance•Proportion•Rate

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7 Languages

In addition to all  the stuff we know about you can have Minitab® in a language other than English if you prefer.Under Tools>Options you can change the languageKorean English FrenchGerman Chinese Spanish Japanese

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Resources for Minitab® 16

Minitab® Tutorials (45 topics)• Provides detailed descriptions and examples

Uses for the given tool or analysis Required data for the analysis How to complete the analysis in Minitab®

Minitab® Assistant • Interactive step-by-step guide to completing common data analyses in Minitab®

• Provides ready-made reports Report card of analysis assumptions Diagnostic reports for evaluating outliers and stability Summary report of the analysis

Quality Trainer• E-learning course with hands-on exercises and quizzes

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Minitab® tutorials

45 Tutorials on many topics of interest

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2-Sample t Minitab® tutorial

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What kind of data is required and what the worksheet should look like.

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As well as an example and step-by-step instructions on how to use the tool

Minitab® ’s Assistant

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When you feel you’re beyond help, consider Minitab® Assistant

Minitab® has chosen a specific set of platforms to add in Assistant targeted to help Six Sigma belts get their analyses done more efficiently.

Check this out

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Output is much nicer

Typical output is a 3-4 page report. Each page can be copied as a graphic to Word or PowerPoint with a right click.

Such as this 3 page report from a 2-sample t-test.

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DataUnusual There are no unusual data points. Unusual data can have a strong influence on the results.

Normality

checked with small samples, you should use caution when interpreting the test results.distributed, the p-value may be inaccurate with small samples. Because normality cannot be reliablyBecause the sample size of A is less than 15, normality can be an issue. I f the data are not normally

SizeSample The sample is sufficient to detect a difference between the means.

Check Status Description

2-Sample t Test for the Mean of A and BReport Card

121110987654321

120

80

40

1715131197531

you would have a 90% chance.chance of detecting the difference. If they differed by 17.074,If the true means differed by 11.652, you would have a 60%For alpha = 0.05 and sample sizes = 12, 17:

100%

17.074

90%

11.652

60%< 40%

Data in Worksheet OrderInvestigate outliers (marked in red).

11.652 60.013.081 70.014.754 80.017.074 90.0

Difference Power

sample sizes of 12 and 17?What difference can you detect with your

A B

PowerWhat is the chance of detecting a difference?

sample sizes.Power is a function of the sample sizes and the standard deviations. To detect a difference smaller than 14.754, consider increasing the

2-Sample t Test for the Mean of A and BDiagnostic Report

100806040

A

B

(p < 0.05).The mean of A is significantly different from the mean of B

> 0.50.10.050

NoYes

P = 0.004

3020100

results of the test.samples. Look for unusual data before interpreting the-- Distribution of Data: Compare the location and means ofthat the true difference is between 5.6046 and 26.474.the difference from sample data. You can be 95% confident-- CI: Quantifies the uncertainty associated with estimatinglevel of significance.-- Test: You can conclude that the means differ at the 0.05

Sample size 12 17Mean 78.333 62.294 95% CI (71.27, 85.40) (53.958, 70.630)Standard deviation 11.122 16.213

Statistics A B

16.039(5.6046, 26.474)

Distribution of DataCompare the data and means of the samples.

Do the means differ?

95% CI for the DifferenceDoes the interval include zero?

Difference between means* 95% CI

* The difference is defined as A - B.

Comments

2-Sample t Test for the Mean of A and BSummary Report

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A warning about using Minitab® Assistant

Minitab® has tried to make these platforms as simple and easy to use as they could. In doing so, sometimes they took a slightly different statistical approach than the traditional one. So the p-values may not always match up exactly.

Minitab® Assistant

Minitab® Menu (assuming equal variances)

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2-Sample t using Minitab® Assistant

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Demo using Hospital Rating Data

Hospital Rating.mpj

Minitab® ’s Quality Trainer

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Quality Trainer

Interactive guide to review specific statistical topics

Learn at your own pace

Test your knowledge with exercises and quizzes

Certificate of completion for certification credits is available from Minitab® upon completion of all material and quizzes (approximately 20 hours of training)

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Quality Trainer contents

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Links to more information

For a complete description of the new features see: http://www.Minitab® .com/en-US/products/Minitab® /whats-new.aspx

  See the link below for access to a Minitab® 16 tour, webinars and

more. http://www.Minitab® .com/en-US/products/Minitab® /launch.aspx

For prerecorded webinars see http://www.Minitab® .com/en-US/theater/default.aspx

  To learn what statistical techniques Minitab® assistant uses in each

platform and why a detailed white paper has been written, go to http://www.Minitab® .com/en-US/support/answers/answer.aspx?id=2613

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Pricing info

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Organize

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Execute

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Customize and The Dashboard

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Questions?

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