制作条形图：用GeoGebra动态展示数据统计与期望值

GeoGebra 命令及参数

1. Sequence(Random[1, 5], i, 1, v, 1) → major, {4, 1, 3, 4, 2, 1, 4, 2, 2, 5, 5, 5, 3, 2, 2, 4, 4, 2, 3, 3, 1, 2, 3, 4, 2, 5, 5, 2, 2, 2}
2. CountIf(x ≟ 1, major) → bio
3. CountIf(x ≟ 2, major) → chem
4. CountIf(x ≟ 3, major) → math
5. CountIf(x ≟ 4, major) → psy
6. CountIf(x ≟ 5, major) → soc
7. Line(A, K) → f
8. Line(B, L) → g
9. Line(D, N) → i
10. Line(E, O) → j
11. Line(F, P) → k
12. Line(G, Q) → l
13. Line(H, R) → m
14. Line(I, S) → n
15. Line(J, T) → p
16. Polygon(A, K, L, B) → q1, a, k_1, l_1, b
17. Polygon(O, P, F, E) → q3, o, p_1, f_1, e
18. Polygon(Q, R, H, G) → q4, q, r, h_1, g_1
19. Polygon(S, T, J, I) → q5, s, t, j_1, i_1
20. Polygon(V, C, D, N) → q2, v_1, c, d, n_1