Question

find the mode of this stem - and - leaf plot.
key: 0 | 5 means 5

Explanation:

Step1: List all data values

Using the key, convert the plot: 5,7,8,10,12,12,15,21

Step2: Find the most frequent value

Count occurrences: 5(1),7(1),8(1),10(1),12(2),15(1),21(1)

Answer:

12