Exam 3: Describing, Exploring, and Comparing Data

Solve the problem. -Skewness can be measured by Pearson's index of skewness: If $\mathrm { I } \geq 1.00$ or $\mathrm { I } \leq - 1.00$ , the data can be considered significantly skewed. Find Pearson's index of skewness for the test scores below. 68 80 37 94 72 42 75 89 84 73 89

The number of vehicles passing through a bank drive -up line during each 15-minute period was recorded. The results are shown below. Find the median number of vehicles going through the line in a 15-minute period. 25 27 25 28 28 25 30 27 35 31 31 29 24 31 25 20 15 27 27 27

Solve the problem. -Elaine gets quiz grades of 90, 83, and 64. She gets a 69 on her final exam. Find the weighted mean if the quizzes each count for 20% and the final exam counts for 40% of the final grade. Round to one decimal place.

Solve the problem. -The prices (in dollars) of 12 electric smoothtop ranges are listed below. 865 1010 655 565 1465 1110 710 765 820 1310 555 1065

Find the standard deviation for the given sample data. Round your answer to one more decimal place than the original data. 22.6 16.1 36.1 36.0 23.8 20.3