Homework 10 part 2 1. The following sets of numbers calculate five -number summary, distribution standard deviation and sample standard deviation: {8, 8,8,9, 10, 10, 10}, {6, 6, 6, 9, 12, 12, 12,12} 2. The 68-95-99.7 Rule. A set of test scores is normally distributed with a mean of 100 and a standard deviation of 20. Use the 68-95-99.7 rule to find the percentage of scores in each of the following categories. a. greater than 100 b, greater than 120 c. less than 80 d. less than 140 e. less than 60 f. less than 120 g. greater than 80 h. between 80 and 120 3. Psychology Exam. The scores on a psychology exam were normally distributed with a mean of 67 and a standard deviation of 8. a. About what percentage of scores were less than 59? b. A failing grade on the exam was anything 2 or more standard deviations below the mean. What was the cutoff for a failing score? Approximately what percentage of the students failed? c. What is the standard score for an exam score of 67? d What is the standard crore for an avam crore of 70? OLD ZA