Learn to compare means using Minitab. Whether it is comparing the performance of a group to a target value, or comparing the performance of two groups, statistical tests are used to evaluate and compare means and to make inferences from sample data. Learn to use Minitab to run the 1-sample t test and the 2-sample t test to make inferences about the population means.
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- [Voiceover] In this movie, I will show you…how to compare means using the student t-test.…Say we have this processing time data…for four offices, A, B, C, and D,…and let's say that there is a corporate target of 20,…so let's compare the performance of A to this target.…So we need to run a one-sample t-test,…but before we do that,…we have to check for normality of data.…So Stat, basic stats.…Normality test on A,…and we see the P-value is very high,…and the plot looks very normal.…
With a P-value of 0.975,…we can conclude that the data is normal,…so let's run the one-sample t-test.…Stat, basic stats, 1-Sample t.…Our data is in column A,…and we want to perform a hypothesis test…against a target of 20.…Go to Options,…and we can specify our test in more detail.…In this case, not equal to is fine for us.…OK, and go to Graphs.…
Let's choose the boxplot…so we can see what's going on.…OK and OK.…So in the boxplot,…we see that the confidence interval is also drawn,…and it does not overlap…with the hypothesized mean value of 20,…
Dr. Richard Chua shows how to import and organize data; open, save, and share Minitab worksheets and projects; create graphs and charts; and use descriptive statistics and statistical tests in Minitab to make inferences and data-driven decisions. Then learn how to make inferences on continuous data—running normality tests, variance tests, correlations, and simple regression tests. Finally, discover how to share your findings with others using reports and simple copy-and-paste techniques. Start watching to learn why Minitab is one of the world's most popular statistical software tools.
- Inputting data in Minitab
- Creating display graphs and charts, including bar and Pareto charts and scatterplots
- Describing data with statistics
- Comparing variance, multiple means, and medians
- Running multiple regression tests
- Comparing proportions
- Saving worksheets and Minitab projects
- Sharing your work and generating reports