Using Yates’s Correction for Continuity The chi-square distribution is continuous, whereas the test statistic used in this section is discrete. Some statisticians use Yates’s correction for continuity in cells with an expected frequency of less than 10 or in all cells of a contingency table with two rows and two columns. With Yates’s correction, we replace

Given the contingency table in Exercise 5 “Splint or Surgery?” find the value of the x2 test statistic using Yates’s correction in all cells. What effect does Yates’s correction have?

(0 - E) with (|0 E| 0.5) - E E