Professor Fair believes that extra time does not improve grades on exams. He randomly divided a group of 300 students into two groups and gave them all the same test. One group had exactly 1 hour in which to finish the test, and the other group could stay as long as desired. The results are shown in the following table. Test at the 0.01 level of significance that time to complete a test and test results are independent.

Question

anonymous · Answer

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anonymous · Answer

Null Hypothesis: Time to take a test and test score are independent.
Alternative Hypothesis: Time to take a test and test score are not independent.

anonymous · Answer

Please help me find the test statistic!