Question

What is the median number of words per minute that students in the keyboarding class can type based on the provided dot plot?

a) 10
b) 20
c) 28
d) 32

Answer 1

The median number of words per minute is:

c) 28

Step-by-step explanation:

To find the median from a dot plot, arrange the data points in ascending order. Count the total number of data points and locate the middle value(s). In the provided dot plot, arrange the numbers in ascending order: 12, 15, 18, 20, 20, 24, 26, 28, 28, 28, 30, 32, 32.

There are 13 data points. The middle value(s) will be the seventh and eighth numbers in this case since there's an odd number of data points. Both the seventh and eighth numbers are 28, indicating that the median number of words per minute that students in the keyboarding class can type is 28.

Identifying the middle value(s) in the ordered data set allows us to determine the median accurately from the dot plot representation of the data, showcasing the typical typing speed of the students in the class.