12/24/2022 0 Comments Chi square minitabWe are comparing two proportions here i.e. This table is called 2 X 2 contingency table (2 rows, 2 columns) We look at the performance data and come up with following figures Suppose, we are analyzing the performance of German soccer team in Germany & Overseas during last 2 years. A comparison between the test statistic and the critical value confirms if a significant difference exists( at a selected confidence level)Ĭomparing proportions(Contingency tables) The degrees of freedom is determined from the calculation(R-1)(C-1) : the number of rows minus 1 times the number of columns minus 1Ħ. This is the most “famous” Chi-Square statistic.ĥ. The following calculation is made for each condition: Compare the observed and expected frequencies to obtain “reality”. Calculate for each condition the expected frequencies(E) under the assumption that no differences exist among the processes.ģ. Take one subgroup from each of the various processes and determine the Observed frequencies(O) for the various conditions being compared.Ģ. This application of Chi Square is called the Contingency table or row and column analysis.ġ. Week 1: The chi-square goodness of fit test, for categorical data. The ability of inspectors to identify defective parts can be evaluated. The stats software of choice for this course is Minitab (available at the CQUEST and. Machines may be compared as to their ability to produce precise parts. It is often necessary to compare proportions representing various process conditions. To test hypothesis of several proportions (contingency table)
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |