3,4,5,1,6
1,8,7,0,9
2,4,4,7,5
4,3,6,6,8
Resolver:
- Dividir en 5 intervalos de clases.
- Confeccionar tablas de frecuencia absoluta, relativa, porcentual y angulo.
- Determinar la media aritmética, moda y mediana.
- Determinar la desviación media.
- Determinar la varianza.
- Determinar la desviación standard.
PUNTO MEDIO DEL INTERVALO DE CLASES
0 – 2 = 1
2 – 4 = 3
4 – 6 = 5
6 – 8 = 7
8 – 10 = 9
INT. | FREC | F.REL | F.PORC | ANGULOS | DESVIACION | CUADRADO |
0-2 | 4 | 4/20=0.2 | 20% | 72° | 4-4.2=-0.2 | 0.04 |
2-4 | 6 | 6/20=0.3 | 30% | 108° | 6-4.2=1.8 | 3.24 |
4-6 | 5 | 5/20= 0.25 | 25% | 90° | 5-4.2=0.8 | 0.64 |
6-8 | 4 | 4/20=0.2 | 20% | 72° | 4-4.2=-0.2 | 0.04 |
8-10 | 1 | 1/20=0.05 | 5% | 18° | 1-4.2=-3.2 | 10.24 |
20 | 100% | 360° | 6.2 | 14.2 |
MEDIA ARITMETICA
1 X 4= 4
3 X6 = 18
5 X 5 = 25
7 X 4 = 28
9 X 1 = 9__
84/20= 4.2
N/Z= 20/2= 10
Fl = 1 + 3= 4
Fe = 5
H = 2
4+ 10 – 4 x2 = 4 +2.4 = 6,4 MEDIANA
5
Moda = 4
14.2/20= 0.71 varianza
0.84 desvio Standard
DESVIACION PROMEDIO
INTERVALO | FREC ABS. FI | VAL.MED. INTE ZI | ZI-Mx | ZI-Mx.FI |
0-2 | 4 | 1 | 1-4.8=-3.8 | 3.8 x 4= 15.2 |
2-4 | 6 | 3 | 3-4.8=-1.8 | 1.8 X 6= 10.8 |
4-6 | 5 | 5 | 5-4.8=0.2 | 0.2 X 5= 1 |
6-8 | 4 | 7 | 7-4.8= 2.2 | 2.2 X 4= 8.8 |
8-10 | 1 | 9 | 9-4.8= 4.2 | 4.2 X 1= 4.2 |
40 |
Mx= Fi.Zi = 4×1+6×5+5×5+4×7+1×9 = 4 +30+25+28+9 = 96 = 4.8
20 20 20 20
MD = 40/20 = 2