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Suppose 50 students took an exam and the average score was 70 with a standard deviation of 10. Use 68-95-997 rule for questions dealing with
Suppose 50 students took an exam and the average score was 70 with a standard deviation of 10. Use 68-95-997 rule for questions dealing with normal distribution. A) If the distribution of scores is perfectly normal, how many students would you expect to get a D or a C? This would be a grade between 60 and 80. B) If the distribution of scores is perfectly normal, how many students would you expect to pass this exam? C) If the distribution of scores is perfectly normal, how many students would you expect to get an A? (A score between 90 and 100) Round up to nearest whole number. D) Suppose another student (the 51st) took the exam and scored a 90. Would the standard deviation of 10 increase, decrease, or stay the same? E) What would be the new average on the test after the score of 90? Round to nearest tenth. 34 increase 70.4 Diet Plan A Diet Plan B Minimum 10 kg 5 kg First Quartile 0 kg 5 kg Median 5 kg 7 kg Third Quartile 10 kg 10 kg Maximum 20 kg 15 kg The table compares two diet plans in terms of kilograms lost over 12 months. NOTE: Negative values indicate WEIGHT GAIN. Which plan had the larger percentage of patients losing more than 15 kg? Which diet plan had a greater percentage of people lose weight? Which diet plan had the larger percentage of patients gain weight? Which diet plan had a larger percentage of patients losing more than 10 kg? Plan B Both the Same Plan B Plan A
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