Sampling days to collect samples.
Using a simple random sampling method.
By way of raffle
Raffle from seven days
Is Monday, Tuesday, Wednesday, Thursday, Friday, Saturday and Sunday.
Members raffle everyone each person three times.
By select a day. from a label that catch the most repeated.
When the raffle is finished.
Mode is the most unique day raffle number.
On Tuesday five people.
Thursday five people.
Saturday six people.
And Sunday five people.
Four days is a day that will performs sampling.