Page 24 - MODULE QUALITY TOOLS DMQ 30262

DMQ 30262

Example 2.3:

HPI is a company specializing in home healthcare solutions for Malaysian

consumers. The company wished to study the relationship between absenteeism
and the number of overtime hours worked by employees. Thirty employees were
randomly selected, and numbers of overtime hours were graphed against

numbers of days absent for the previous year is shown in Table 2.2 and Figure
2.9.

Table 2.2 Numbers of Overtime Hours VS Numbers of Days Absent

Employee Hours of Days Absent Employee Hours of Days Absent
Overtime Overtime
1 243 3 16 260 2
2 126 2 17 0 1
3 86 0 18 126 1
4 424 6 19 234 2
5 236 3 20 246 3
6 128 0 21 120 1
7 0 0 22 80 0
8 126 2 23 112 1
9 324 3 24 237 3
10 118 0 25 129 2
11 62 0 26 24 1
12 128 3 27 36 0
13 460 6 28 128 2

14 135 1 29 246 3
15 118 1 30 326 6

Solution:

This analysis showed that there appeared to be a positive relationship between

number of days absent and hours of overtime. Subsequent analysis showed that,
in fact, these variables were significantly related. This led management to

recalculate the actual cost of overtime.

KKTM Kuantan 23 DMQ 30262