Statistical Analysis for Education and Psychology Researchers

16 0000 4

15 000000000000000000 18

14 00000000000 11

13 0000000000000000 16

12 0000000 7

11 000000000 9

10 000000 6

9 00 2

8 00 2

70 1

Figure 3.11: Stem and leaf plot of the variable

ASCORE1 (Total A-level points score)

It is possible when plotting a stem and leaf plot to split the stems in two thereby showing
the distribution in more detail. Look, for example, at the distribution of the variable
AGEY (age in years) in Figure 3.12.
Stem Leaf #
27 2 1
26
26
25
25
24
24 2 1
23
23
22
22
21 8 1
21 1 1
20 667789 6
20 112333 6
19 555556666667889 15
19 0000000001111112223344444 25
18 55556666666677777888888888888889999 36
18 11222222222223333444 20
17 8 1
17
16 8 1

Figure 3.12: Split stem and leaf plot

for the variable AGEY (age in years)

Initial data analysis 55