Let's say that the control limits for the propo that are not happy with the service they receive in a restaurant are: $LCL=0\mathrm{.}025$ and UCL$=0\mathrm{.}050.$ The management of the restaurant would not like to see any more than $10\%$ unhappy customers on any given day.

If on a particular day, $9$ customers out of a total of $150$ customers are not happy with the service, the management should reach the following conclusion $($check all that apply$)$:

This is the usual number of customers that are not happy with our service

The number of customers that were not happy with our service were unusually high

The process meets management's expectations

The process does not meet management's expectations

Not enough information to answer the question:

None of the above