Chi Square Practice Problems Name:_________________________________ Period:____ Date:_______________________ At Licking Heights, students can choose to enter one of three doors. Custodians noticed that door 3 was always getting broken and suggested that more must be using that door. Mrs. Ouellette’s AP Biology class, who has just learned about analytical statistics, decides to count the number of students entering each door to determine whether the custodian’s claim is significant. 1 Number of Students Observed Entering 60 2 66 3 80 Door a. Specify the null and alternative hypothesis and perform a chi-square test on the data. b. Explain whether your null hypothesis is supported by the chi-square test and justify your explanation.