Statistics Help
Question: Lewis earned 85 on his biology midterm and 81 on his history midterm. In the biology class the mean score was 79 with a standard deviation of 5. In the history class the mean score was 76 with a standard deviation of 3. Edit
Answer: Z-score = (score - mean) / Standard Deviation
z-score of Biology = (85 - 79) / 5 = 1.2
z-score of History = (81 - 76) / 3 = 1.67
He did better in History as the z-score of history is more than
z-score of biology. Edit
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