The sample is 30 and the population is every possible point on car.
Given,
The quality control engineer wants to find the thickness of paint on a car at her factory.
Points he select on the car is 30.
First we have to know about sample and population in a given data.
The difference between population and sample is that the population includes all the units from a set of data. The sample includes a small group of units selected from the population.
For example, a population may be all people living in Canada and the sample may be a specific group of people living in Canada.
Hence, the sample is 30 and the population is every possible point on car.
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