Formulas Estadistica Mola Mazo

  • May 2020
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•Practica 1 y 2 •Tabla de formulas estadistica. •tamaño: n=contar(muestras) •ai=a1=0, a2=2...a5=10 •bi=b1=a1+ lon,b2=b1+a2 •Xi= (ai+ bi)/2 •fi= frecuencia relativa = Fab/n •Fi=frecuencia acumulada= Fi(anterior)+ fi de la misma fila •Fab =marco una matriz y para el conjunto pongo =frecuencia(la muestra o los datos k se cojen(muestra); y bi[]) =frecuencia(muestra;bi[]) ctrl+alt+enter •------------------------------------------------•a1= min(muestra); •b5=max(muestra)+2 •clases= raíz de n •lon=redondear ((b5-a1)/clases;0) •------------------------------------------•para hacer k1 •a3=suma ((xi[]-x)^3*(fi[])) ctrl+ alt+enter •s3=s^3 •a4=suma ((xi[]-x)^4*(fi[])) ctrl+ alt+enter •s4=s^4 •---------------------------------•estadisticos •n=suma((fab1+fab2+fab3....fabi)/n) •media = x=suma( xi[]*fi[]) {ctrl +alt+enter} •percentil: Q1= precentil (xi[];0,25) Q2= percentil (xi[];0,5) Q3= percentil (xi[];0,75) •cuartil: Q1=1º xi+(0,25-1º Fi)*((2ºxi-1ºxi)/(2ºFi-1ºFi) Q2=2º xi+(0,50-2º Fi)*((3ºxi-2ºxi)/(3ºFi-2ºFi) Q3=3º xi+(0,75-3º Fi)*((4ºxi-3ºxi)/(4ºFi-3ºFi) •s" varianza= suma((xi-x)^2)*(fi[]) ctrl+alt+enter •s desviacion tipica= raiz s" •s^2 varianza corregida centrada=(n*s2)/(n-1) •s^=raiz s^2 ----------------------------------------------------------------forma •g1 coeficiente de asimetria=a3/s3 •k1 coeficiente de apuntamiento=a4/s4 •k2 coeficiente de apuntamiento=k1-3 -----------------------diagrama de cajas •lim inf= percentil Q1-((percentilQ3-percentilQ1)/1,5)*2 •lim sup= percentil Q1+((percentilQ3-percentilQ1)/1,5)*2 •m= min(xi[]) •m-1 ó M= max(xi[]) --------------------------•con=bi[]/clases

------tchevychev •frecuencia= te la dan •k=raiz(1/(1-frecuencia)) •a=max ((x-k*s);min(xi[])) ctrl+alt+enter •b=min((x+k*s);max(xi[])) ctrl+alt+enter practica3 x=x media e y= y media, X=x e Y=y •covarianza=covar(Xi[];Yi[]) (peso/estatura) ctrl+alt+enter •x=(suma(datos X[]))/n ctrl+alt+enter •y=(suma(datos Y[]))/n ctrl+alt+enter •s2x=(suma((datosx[]-x)^2))/n ctrl + alt enter •s2y=(suma((datosy[]-y)^2))/n ctrl + alt enter •sx=raiz s2x •sy=raiz s2y •r=cov/(sx*sy) ------------------------regreson lineal "rectas" •eje y •a=cov/ s2x •b=y-(a)*x •Ry= •eje x •a=S2y/cov •b=y-(a)*x •Rx =

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