Use the following information for questions 25-26: You ask a sample of 155 students, “Should clinical trials on issues such as heart attacks that affect both sexes use subjects of just one sex?”  The responses are in the table below.   26. What is the chi-square contribution for females who said yes?     a. 2.2479   b. 1.7934   c. -0.2022   d. -8.87

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