![minitab chi square minitab chi square](https://slidetodoc.com/presentation_image_h2/3b1ccc56a08132d0a5e7c602e515d774/image-38.jpg)
The p-value is > 0.05, infer the null hypothesis, H O. The term "trials" is the denominator of the percentage (or the population of registered voters in this case). When entering the data in Minitab for this example the "events" are sometimes referred to as the "successes" although that may not be the correct term to apply to each problem.
![minitab chi square minitab chi square](https://www.leansigmacorporation.com/wp/wp-content/uploads/2016/01/Chi-Square-EQ1.png)
Using Minitab to determine the exact p-value. Calculate the p-value applying the Binomial Distribution.Ī registered voter did one of two things: Voted or Did not Vote (binomial). Is the percentage of voters from the last election Target value (one-tail)Īssume the α-risk is 0.05. Reject the null hypothesis if p-value < α-risk. Is the proportion from the population different from the target value? The target value may be an actual target, a historical value, or some other given value. Test the hypothesis that at least 25% of the people turned out for the last election. The goal for that party is to have fewer than 25% of registered voters to vote in the next election. One party believes that if there is a lower overall turnout they will have a better chance to win the next election. Furthermore, could evaluate this by female or maleĭetermine if there is a difference in the percentage of voters that turn out for two electionsĭetermine if there is a difference in the defect rates between two operators (or two machines, or two shifts)ĭetermine if there is a difference in percentage of delivery performance among two suppliersĬompare proportion of females and males that are vegetariansĭetermine if there is a difference in percentage of delivery performance among six suppliersįollow the process below for hypothesis testing to help break down the problem to simpler steps.Ī Six Sigma Black Belt gathers data that shows 27,798 out of 112,561 registered voters voted in the last election.
![minitab chi square minitab chi square](https://www.six-sigma-material.com/images/1ProportionMinitab1.png)
2 Proportion Test: Analyze difference in two sample, independent, proportionsĭetermine if there is a difference in the percentage of voters that turn out for an election compared to a target (or claim)ĭetermine if a percentage success rate claim is actually as claimedĭetermine if proportion of vegetarians has grown compared to the proportion from two years ago.1 Proportion Test: Analyze difference in a sample proportion and target.The following two test will be covered below and chi-square is within another module.