Astudent believes that the average grade on the final examination in statistics is at least 85. She plans on taking a sample to test her belief. The correct set of hypotheses is O a. Ho:H < 85 Ha: u 85 O b. Ho:H > 85 Ha: u 85 O c. Ho:U <85 Ha: u > 85 O d. Ho:u 85 Ha: u < 85

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