make an ordered stem-and-leaf plot of the data, 16.9,17.8,16.3,16.4,17.8,18.1,15.4,16.8,17.1,18.3,15.5,16.2,17.9

To make an ordered stem-and-leaf plot, you first need to sort the data in ascending order. Here is the sorted list of values you provided:

15.4, 15.5, 16.2, 16.3, 16.4, 16.8, 16.9, 17.1, 17.8, 17.8, 17.9, 18.1, 18.3

In a stem-and-leaf plot, the stems represent the tens place of each value, and the leaves represent the ones place. To create the plot, follow these steps:

Step 1: Determine the stems.
Look at the tens place of each value and write down all the unique numbers. In this case, we have 1, 2, 3, 6, 7, and 8 as the stems.

Step 2: Write down the leaves.
For each value, write down the ones place corresponding to the stem. Start with the smallest value and work your way up. For example, for the first value 15.4, the stem is 1 and the leaf is 4.

Step 3: List the leaves for each stem.
Write down the leaves for each stem in ascending order. For example, the stem 1 has leaves 4 and 5. The stem 2 has leaf 2. The stem 3 has leaf 2. The stem 6 has leaf 8. The stem 7 has leaves 1, 8, and 9. The stem 8 has leaf 1 and 3.

Step 4: Create the stem-and-leaf plot.
Organize the stems and leaves in a table format. The stems go in one column, and the leaves for each stem go in the adjacent column.

Here is the stem-and-leaf plot for the given data:

Stem | Leaves
-------------------
1 | 45
2 | 2
3 | 2
6 | 8
7 | 189
8 | 13

Each stem represents the tens place, and the leaves represent the ones place. For example, the value 15.4 is represented as 1 | 4 in the plot.

I hope this helps you create an ordered stem-and-leaf plot for any set of data!