Jamie recorded the time it took 25 students to complete a mathematics
test. She created a histogram and a stem-and-leaf plot to represent the
data. To determine the median of the data set, Jamie analyzed the-
a) histogram because it showed each value in the set of data
b) stem-and-leaf-plot because it showed each value in the set of data
c) histogram because the median is always the bar with the greatest
height
d) stem-and-leaf-plot because the median is always the "leaf" that
appears most often

b) stem-and-leaf-plot because it showed each value in the set of data

Step-by-step explanation:

First let's clarify the concept of median, the median is the average value of a sample of data, that is, the data of half.

Now, a histogram is a graph of frequency, therefore although it organizes the data from highest to lowest, we will see the number of times in this case the age is repeated in a certain range.

For its part, stem-and-leaf-plot shows each data of the sample in an organized way, therefore it will be easier to find the data of half.

In other words, the correct answer is b.