Calculate the missing values of X and H based on the provided box-and-whisker plot and data, considering the median calculation for an even number of data points.

Here are the calculations for the missing values and comparisons.

1.1 Calculate the missing values of X and H.

• X, by reading the median value from the box-and-whisker plot: The box-and-whisker plot for Class A shows the median (the line inside the box) at 60. There are 26 learners in Class A. For an even number of data points, the median is the average of the $\frac{n}{2}$-th and $(\frac{n}{2} + 1)$-th values. Here, $n=26$, so the median is the average of the 13th and 14th values. From the given arranged marks: