# statq2a - Quiz 2 Part1of6 Question1of6 Scores on an exam...

Quiz 2 Return to Assessment List   Part 1 of 6 -  Question 1 of 6 Scores on an exam follow an approximately bell shaped distribution with a mean of 76.4 and a standard deviation of 6.1 points. Approximately, what percentage of the data is between 70.3 points and 82.5 points? A. 99.7% Feedback: No, 70.3 and 82.5 are one standard deviation away from the mean. So, according to the Empirical  Rule, there should be 68% of the data within one standard deviation.  B. 95% C. 68% D. 50% Feedback: This is an application of the Empirical Rule. The Empirical Rules states that about 68% of the data lies within one standard deviation of the mean, about 95% of the data lies within two standard deviations of the mean and about 99.7% of the data lies within three standard deviations of the mean.
Part 2 of 6 -  Question 2 of 6 Match each term on the left column with the appropriate description from the right column description. Each answer choice will only be used one time. 1. mean 2. median 3. mode 4. range 5. IQR 6. variance 7. standard deviation Feedback: Be very careful with this problem. A measure of center is a mean, mode, or median. A measure of spread is a range, IQR, variance or standard deviation. Part 3 of 6 -
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