The following are multiple choice questions (with answers) about medical knowledge.   **Question:** In a group of 100 people, the average GFR is 85 ml/ min with a standard detion of 25. What is the range for 90% confidence interval?   (A) 81-89   (B) 80-90   (C) 75-95   (D) 70-100
['(A) 81-89 <> answer', 'The following are multiple choice questions (with answers) about medical knowledge. <> instruction', '(A) 81-89 \n (B) 80-90 \n (C) 75-95 \n (D) 70-100 <> possible answers', '  In a group of 100 people, the average GFR is 85 ml/ min with a standard detion of 25. What is the range for 90% confidence interval? <> context@']