A **representative sample** can be used to make predictions about a population.

In the sample, 28 customers ordered juice and 4 customers ordered tea.

Since 4 × 7 = 28, it can be predicted that 7 times as many of the customers would order juice as tea.

In the sample, 19 out of 100 customers ordered coffee.

Since 1,000 is ten times 100, it can be predicted that 19 × 10 = 190 of the 1,000 customers would order coffee.

In the sample, 33 out of 100 customers ordered water, which is $\frac{33}{100}$ = 33% of the customers.

So, it can be predicted that 33% of the 1,000 customers would order water.