Which stem-and-leaf plot represents the data 80, 81, 91, 92, 66, 55, 54, 30, 55, 79, 78?

Convert the given data into ascending order.

30,54,55,55,66,78,79,80,81,91,92

Here the minimum value is 30 and maximum is 92.

Total counts=11

Now plot the data.

Stem | Leaf

3 | 0

5 | 4 5 5

6 | 6

7 | 8 9

8 | 0 1

9 | 1 2

This is the required stem leaf plot.