ฮิสโทแกรม

import matplotlib.pyplot as plt
import numpy as np

rng = np.random.default_rng(3)
heights = rng.normal(165, 8, 500)

fig, ax = plt.subplots(figsize=(7, 4))
ax.hist(heights, bins=20, color="#6366f1", edgecolor="white")
ax.axvline(heights.mean(), color="#ef4444", linestyle="--", label=f"mean {heights.mean():.1f} cm")
ax.set_xlabel("Height (cm)")
ax.set_ylabel("People")
ax.set_title("Heights of 500 people")
ax.legend()
plt.show()