ELEMENTO A.

N° X Xᶺ2

X1 7.125 37,491

X2 3.928 24,265

X3 6.112 26,894

X4 7.025 38,007

X5 5.385 29,008

X6 5.112 24,364

X7 5.085 30,107

X8 5.108 19,061

X9 3.285 19,254

X10 5.655 29,789

TOTAL 53.82 291.241

n=( 40 √10 (291.241 )−(53.82 )2

53.82 )2

n=¿8.73 = APROX. = 9

CONCLUSION: tamaño de muestra n=¿8.73 = APROX. = 9

ELEMENTO B

N° X X^2

X1190,71 36370,3041

X2 168,7 28459,69

X3 148,7 22111,69

X4 193,06 37272,1636

X5 153,66 23611,3956

X6 177,52 31513,3504

X7 150,64 22692,4096

X8 179,63 32266,9369

X9 170,113 28938,4328

X10181,56 32964,0336

TOTAL 1714,29 296200,40

n=( 40 √10 (296200.40 )− (1714.29 )2

1714.29 )2

n=¿12.63 =APROX. = 13

CONCLUSION: debido a que el n arojo un tamaño de muestra de n=¿12.63 =aprox. = 13, se debe volver a tomar los datos con ese valor

ELEMENTO B

N°X

X^2

X1 143,5620609,4736

X2 145,68 21222,6624

X3 157,44 24787,3536

X4 154,23 23786,8929

X5 152,67 23308,1289

X6 155,67 24233,1489

X7 150,64 22692,4096

X8 153,62 23599,1044

X9 147,6 21785,76

X10 157,45 24790,5025

X11 144,35 20836,9225

X12 156,73 24564,2929

X13 163,07 26591,8249

TOTAL 1982,71 302808,477

n=( 40 √13 (302808.47 )−(1982.71 )2

1982.71 )2

n=¿2,18 = APROX. = 3

CONCLUSION: tamaño de muestra n=¿2,18 = APROX. = 3