About 60% of people in North America know how to swim. Use that statistic to answer
the questions below.
In a classroom with 40 people, how many do you expect to know how to swim?
In a school with 2,000 people, how many do you expect to know how to swim?
Are these numbers exactly how many people will know how to swim? Or just a prediction?
Each of these numbers is
how many people you can expect to know how to swim in each group.

In this response, we explain how to calculate the expected number of people who know how to swim based on a given statistic for different group sizes.

Explanation:

60% of people in North America know how to swim. In a classroom with 40 people, you would expect 24 to know how to swim (40 x 0.6). In a school with 2,000 people, you would expect 1,200 to know how to swim (2000 x 0.6).

These numbers are predictions based on the given statistic. They represent the expected proportion of people who know how to swim in each group.

Learn more about Expected Values in Statistics here:

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