The following set of data is from a sample of n = 6: 7 4 9 7 3 12 a. Compute the mean, median, and mode. b. Compute the range, variance, standard deviation, and coefficient of variation.

c. Compute the Z scores. Are there any outliers? d. Describe the shape of the data set.

The file Mobile Commerce contains the following mobile commerce penetration values, the percentage of the country population that bought something online via a mobile phone in the past month, for twenty-eight of the world's economies:

23 27 26 25 40 19 26 36 23 33 23 11 38 21

26 23 21 33 40 15 55 30 41 31 47 37 33 28 a. Compute the first quartile (Q1), the third quartile (Q3), and the interquartile range.

b. List the five-number summary. c. Construct a boxplot and describe its shape.

Exam Scores The data in the next column represent exam scores in a statistics class taught using traditional lecture and a class taught using a "flipped" classroom. The "flipped" classroom is one where the content is delivered via video and watched at home, while class time is used for homework and activities.