1. The average number of hours that people of Brazil spend per month on social networking sites is nearly double the worldwide average, drawing the attention of social media companies. The following data represent the number of hours that a sample of people from Brazil spent on a social networking site last month. Complete parts a through f.

1.9 1.7 2.1 12.4 8.8 13.3 40.4 1.9 12.3

A) Calculate the mean.

The mean is_______

B)Calculate the median.

The median is_______

C) Calculate the mode.

The mode is________

Determine the mode. Select the correct choice below and, if necessary

a. The mode(s) is/are________

(integer or a decimal. Do not round. Use a comma to separate answers as needed.)

b. The mode does not exist.

D) Which of these three measurements would best describe the central tendency of the data? Choose the correct answer below.

a. Mode

b. Median

c. Mean

E) Describe the shape of the distribution.

This distribution is____________________ because the mean is_______the median

not skewed less than

right-skewed greater than

left-skewed equal to

2. Consider the following data values.

7 2 18 13 12 5 8 17 13

A) Calculate the mean.

(Round to three decimal places as needed.)

B) Calculate the median.

(Do not round.)

C) Determine the mode(s). Select the correct choice below and, if necessary,

Determine the mode(s). Select the correct choice below and, if necessary

a. The mode(s) is(are) ______

(Use a comma to separate answers as needed.)

b. There is no mode in this data set.

D) Describe the shape of the distribution. Choose the correct answer below.

a. Because the mean is greater than the median, this distribution's shape is right dash skewed.

b. Because the mean and median are very close, this distribution's shape is symmetrical.

c. Because the mean is less than the median, this distribution's shape is left dash skewed.

d. The shape of this distribution cannot be described with the information given.