4. .

13. I=7 Xi f f*Xi Fa fr ° Li Ls fs d 𝒅 𝟐
f*𝒅 𝟐 /d/ f* /d/
0 2.25
39 45 42 9 378 9 9.89 35.60 38.5 45.5 7.25 -23 529 4761 23.92 215.28
46 52 49 11 539 20 12.09 43.52 45.5 52.5 10.75 -16 256 2816 16.92 186.12
53 59 56 12 672 32 13.19 47.47 52.5 59.5 12.75 -9 81 972 9.92 119.04
60 66 63 16 1008 48 17.58 63.30 59.5 66.5 14.50 -2 4 64 2.92 46.72
67 73 70 14 980 62 15.38 55.38 66.5 73.5 13.75 5 25 350 -4.08 -57.12
74 80 77 11 847 73 12.09 43.52 73.5 80.5 11.25 12 144 1584 -11.08
-
121.88
81 87 84 9 756 82 9.89 35.60 80.5 87.5 9.50 19 361 3249 -18.08
-
162.72
88 94 91 9 819 91 9.89 35.60 87.5 94.5 6.75 26 676 6084 -25.72
-
225.72
91 5999 100 360 19880 -0.28

14. 10%
12%
13%
18%
15%
12%
10%
10%
Promedio de Calificaciones de la Primera
Unidad
9.89% 12.09% 13.18% 17.58%
15.38% 12.09% 9.89% 9.89% I=7 f
39 45 9
46 52 11
53 59 12
60 66 16
67 73 14
74 80 11
81 87 9
88 94 9