Refer to the maintenance cost variable

Refer to the Buena School District bus data.

a. Refer to the maintenance cost variable. Develop a box plot. What are the first and third quartiles? Are there any outliers?

b. Determine the median maintenance cost. Based on the median, develop a contingency table with bus manufacturer as one variable and whether the maintenance cost was above or below the median as the other variable. What are your conclusions?