Question

As unit digits are single digits, is it possible to include them in a stem and leaf plot? Answer in Yes/No.

Answer 1

For plotting unit digits in a stem and leaf plot, a zero is prefixed with the unit digits.
$9\to 09$

Henceforth, it is treated as a double-digit number.
Consider the data set:

$13$

$16$

$7$

$9$

$17$

By prefixing $0$ to the unit digits,

$13$

$16$

$07$

$09$

$17$

Now, include the tens place digit in the stem column and the corresponding ones place digit in the respective row of leaf column.

Example:
The plot for the given data set is as follows: Stem Leaf

$0$ $1$	$7,9$ $3,6,7$