4 A hotel property logged the number of complaints they rece

4) A hotel property logged the number of complaints they received in each of 10 days. The table below reports the findings. Determine the UCL of the control chart.

day

Complaints

1

0

2

3

3

2

4

4

5

2

6

5

7

4

8

8

9

2

10

0

Solution

Here we shall consider a X bar Chart

In a X bar chart the UCL is given by

Mean(x) + 3* Standard Deviation(x) / Square root(n)

Here n=10

Hence the UCL=10.09