The two-way table shows the number of 12th grade students in a school who have bikes and/or skateboards at home.


Have Bikes Do Not Have Bikes
Have Skateboards 30 70
Do Not Have Skateboards 70 80

A Probability and Statistics student created a segmented bar chart to assist in analyzing the data set.

a segmented bar graph titled 12th grade students with the first bar labeled have bikes showing the have skateboards section going from 0 percent to 40 percent and the do not have skateboards section going from 40 percent to 100 percent and the second bar labeled do not have bikes showing the have skateboards section going from 0 percent to about 67 percent and the do not have skateboards section going from about 67 percent to 100 percent

Part A: Did the student create the segmented bar chart correctly? Why, or why not? (6 points)

Part B: What is the greatest joint relative frequency value, and what does it represent in the context? (4 points)