QUESTION $11$

Problem $7$ of Chapter $10.$

The postmaster of a small western town receives a certain number of complaints each day about mail delivery. Determine three sigma control limits using the following data.

Day

$1,2,3,4,5,6,7,8,9,10,11,12,13,14$

Number of Complaints

$\backslash$table$[[4,10,14,8,9,6,5,12,13,7,6,4,2,10]]$

Which control chart should we use for this problem?

C chart

Mean chart

$P$ chart

$R$ chart