What are the real limits of the 20-24 class in this distribution?

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Multiple Choice

What are the real limits of the 20-24 class in this distribution?

Explanation:
Real limits show the exact span of a class when data are treated as continuous, accounting for measurement precision. For a class labeled 20–24, you extend half a unit below the lower boundary and half a unit above the upper boundary to avoid overlap with adjacent classes. The lower real limit is halfway between 19 and 20, which is 19.5. The upper real limit is halfway between 24 and 25, which is 24.5. Therefore, the real limits are 19.5 to 24.5. This also means the class width is 5 units.

Real limits show the exact span of a class when data are treated as continuous, accounting for measurement precision. For a class labeled 20–24, you extend half a unit below the lower boundary and half a unit above the upper boundary to avoid overlap with adjacent classes. The lower real limit is halfway between 19 and 20, which is 19.5. The upper real limit is halfway between 24 and 25, which is 24.5. Therefore, the real limits are 19.5 to 24.5. This also means the class width is 5 units.

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