To determine which histogram is symmetrical, we can analyze the provided frequency distributions. A symmetrical histogram will have frequencies that are mirrored around its center.
Here's the breakdown of each histogram's frequency distributions:
-
First Histogram:
- 12 to 14: 1
- 14 to 16: 2
- 16 to 18: 3
- 18 to 20: 3
- 20 to 22: 5
- Observation: This is not symmetrical; it increases until the range of 20 to 22, which has the highest frequency.
-
Second Histogram:
- 12 to 14: 4
- 14 to 16: 5
- 16 to 18: 5
- 18 to 20: 1
- 20 to 22: 2
- Observation: This is also not symmetrical; frequencies on the left are high and drop significantly after the mid-point.
-
Third Histogram:
- 12 to 14: 3
- 14 to 16: 5
- 16 to 18: 2
- 18 to 20: 2
- 20 to 22: 2
- Observation: This histogram is not symmetrical; the heights do not create a mirrored effect.
-
Fourth Histogram:
- 12 to 14: 1
- 14 to 16: 2
- 16 to 18: 3
- 18 to 20: 2
- 20 to 22: 1
- Observation: This histogram is symmetrical. The frequencies increase until the center (16 to 18) and then decrease, resembling a mirror image around the center of the range.
Conclusion: The fourth histogram is the only one that is symmetrical.