A streaming service logs how long each viewing session lasted, in minutes, across 39 sessions:
| Session length (min) | Frequency |
|---|---|
| [0, 20) | 2 |
| [20, 40) | 14 |
| [40, 60) | 5 |
| [60, 80) | 3 |
| [80, 100) | 4 |
| [100, 120) | 9 |
| [120, 140) | 2 |
Which term best describes the shape of this distribution?
Once you get it right, the reasoning behind the answer shows up here.
Select all that apply.
Visualize binning frequency, check distribution shapes, and inspect skewness effects on center measures.
This shape has a single prominent peak in the center with frequencies decreasing symmetrically toward both tails. Many biological traits, like heights or exam scores in large groups, naturally approximate this bell shape.