2.3.77 steam-leaf

A quantitative data set is provided in the table. Construct a​ stem-and-leaf diagram for the data, using one line per stem.

Choose the correct stem-and-leaf diagram.

First, we need to import the data from Excel. (For simplicity, this imports mannual by hand, we can get the same result by importing dataset from Excel)

data <- c(40, 59, 45, 41, 62, 25, 43, 57, 35, 31)
data

##  [1] 40 59 45 41 62 25 43 57 35 31

---

We can get stem-and-leaf diagram by using stem() command.

stem(data)

## 
##   The decimal point is 1 digit(s) to the right of the |
## 
##   2 | 5
##   3 | 15
##   4 | 0135
##   5 | 79
##   6 | 2

---

---

It is important to know how to get stem-and-leaf diagram. In this case, we rewrite each data value by split them into smaller digits.

data

##  [1] 40 59 45 41 62 25 43 57 35 31

40 -> 4|0

59 -> 5|9

45 -> 4|5

41 -> 4|1

62 -> 6|2

43 -> 4|3

…

Add them together and arrange the number in increasing order, we have the final stem-and-leaf diagram and

2|5

3|1 5

4|0 1 3 5

…

Hope that helps!