Learn to use Minitab to make inferences when comparing proportions. Flipping a coin to see who gets heads or tails is very common. If heads show up 8 out of 10 times, is the coin a fair coin? How do you evaluate that? Is there sufficient power? If two offices have a 65 percent and 70 percent win-rate on their respective sales proposals to clients, is there a true difference in performance between the two offices? Be able to make sound decisions quickly with Minitab when analyzing proportions data. Learn to run the 1-proportions test, the 2-proportions test and determine power and required sample sizes using Minitab.
- [Voiceover] In this movie,…I will show you how to compare proportions…using Minitab.…Open up a blank worksheet in Minitab…or you can use exercise file 05-01.…Let's say I have a situation…where I have 70 heads…out of 100 coin tosses.…The question then is,…is that a fair coin?…We can test for that.…Go to Stat,…Basic Statistics,…One Proportion.…And our data is a summarized data,…so let's select that.…
So, we have 70 heads out of 100 coin tosses…and we want to verify if it's a fair coin or not.…So, perform hypothesis test…against zero point five,…where I have a 50% chance of heads.…Options,…and the settings here look good.…We're testing for equality or not.…OK…and OK.…And here we have the one proportion test printout…showing a p value of zero point zero zero zero,…less than zero point five.…
Therefore, we reject the null hypothesis.…Meaning it is not a fair coin.…Meaning that the proportion is not equal to zero point five…and this is confirmed by the confidence interval,…which does not include zero point five.…So, that's the one proportion test.…
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