37644535
Description
Mind Map by betty tamara chate, updated more than 1 year ago
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Created by betty tamara chate
over 3 years ago
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bivariate statistical measures
of regression correlation
- bivariate statistical
measures
- regression and correlation.
- Dispersion diagram
- simple linear regression
- correlation
- multiple regression
- regression and correlation.
- regression analysis model
- Statistical: Allows the
incorporation of a random
component in the relationship.
- standardized: the slope B 1 tells
us if there is a relationship
between two variables
- deterministic: that under ideal
conditions, the independent
variable can be a mathematical
function of independent variables
- Statistical: Allows the
incorporation of a random
component in the relationship.
- problems with regression
- inhomogeneous variance
- nonlinear relationship
- correlated errors
- inhomogeneous variance
- regression analysis
- studies the relationship between two
quantitative variables
- statistical technique used to derive an
equation that relates a criterion variable to
one or more predictor variables
- studies the strength of the association through a
measure of association called the correlation
coefficient
- studies the relationship between two
quantitative variables
- simple regression
model
- And the ŷ, since they rarely coincide, no matter how
good the regression model is, to the quantity "-e Y-ŷ" is
called the residual error.
- We find a very simple-linear function of X, which allows
approximation by means of -ŷ=b0+ b1X
- And the ŷ, since they rarely coincide, no matter how
good the regression model is, to the quantity "-e Y-ŷ" is
called the residual error.
- linear regression
- pearson linear correlation coefficient
- if the points have a tendency to line
up
- r is useful to determine if there is a
linear relationship between two
variables. But it won't work for
(quadratic, logarithmic.
- has the same sxy sign
- if the points have a tendency to line
up
- covarianza de dos variables aleatorias X e Y
- Entre dos variables, Sxy, nos indica si la relación entre dos variables es
directa o inversa
- The sign of the covariance tells us that the cloud of points is increasing or
not, it says nothing about the degree of the relationship between
variables.
- The sign of the covariance tells us that the cloud of points is increasing or
not, it says nothing about the degree of the relationship between
variables.
- Entre dos variables, Sxy, nos indica si la relación entre dos variables es
directa o inversa
- pearson linear correlation coefficient
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