Question Video: Determining the Percentage Size of a Sample Using the Population Size and Sample Size Mathematics • First Year of Preparatory School

Video Transcript

A garden consists of 200 trees. We want to take a sample of 20 trees. Express the sample size chosen using percentage.

Remember, the sample size is the number of members in the sample, the subset of the population. In this case, we’re taking a sample of 20 trees, so the sample size is 20. The garden consists of 200 trees, so this is the total population size. So we can express the sample size as a percent of the population by dividing the sample size by the population size and multiplying by 100. That’s 20 divided by 200 times 100, which is equal to 10. So we’ve expressed the sample size as a percentage. It’s 10 percent.