What is the midpoint of the class interval 15-19?

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Multiple Choice

What is the midpoint of the class interval 15-19?

Explanation:
The midpoint of a class interval is the value exactly halfway between its lower and upper bounds. For 15-19, add the endpoints: 15 + 19 = 34, then divide by 2 to get 17. This midpoint, often called the class mark, represents the center of that interval and is used when estimating means or plotting grouped data. The endpoints themselves (15 and 19) are not the center, and inside values like 16 or 18 are not the middle of the interval. So the midpoint is 17.

The midpoint of a class interval is the value exactly halfway between its lower and upper bounds. For 15-19, add the endpoints: 15 + 19 = 34, then divide by 2 to get 17. This midpoint, often called the class mark, represents the center of that interval and is used when estimating means or plotting grouped data. The endpoints themselves (15 and 19) are not the center, and inside values like 16 or 18 are not the middle of the interval. So the midpoint is 17.

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