Question

find the mode of this stem - and - leaf plot.
key: 6 | 8 means 68

Explanation:

Step1: Understand stem - leaf plot

In a stem - leaf plot, the stem is the tens digit and the leaf is the units digit. So we first convert the stem - leaf plot into a set of data points.
For stem 6: leaves are 8, 9, 9. So the numbers are 68, 69, 69.
For stem 7: leaves are 0, 2, 5. So the numbers are 70, 72, 75.
For stem 8: leaves are 0, 1, 3. So the numbers are 80, 81, 83.

Step2: Find the mode

The mode is the number that appears most frequently in a data set.
Looking at the data points: 68, 69, 69, 70, 72, 75, 80, 81, 83.
The number 69 appears 2 times, and all other numbers appear 1 time.

Answer:

69