Choose the correct answer for the following question: A data set consist of four (x, y) pairs of numbers: (0, 1), (1,0), (0,2) & (2,0). What is the value of linear correlation coefficient? 2dcfo F-8<µ
Correlation
Correlation defines a relationship between two independent variables. It tells the degree to which variables move in relation to each other. When two sets of data are related to each other, there is a correlation between them.
Linear Correlation
A correlation is used to determine the relationships between numerical and categorical variables. In other words, it is an indicator of how things are connected to one another. The correlation analysis is the study of how variables are related.
Regression Analysis
Regression analysis is a statistical method in which it estimates the relationship between a dependent variable and one or more independent variable. In simple terms dependent variable is called as outcome variable and independent variable is called as predictors. Regression analysis is one of the methods to find the trends in data. The independent variable used in Regression analysis is named Predictor variable. It offers data of an associated dependent variable regarding a particular outcome.
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Choose the correct answer for the following question:
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A data set consist of four (x, y) pairs of numbers: (0, 1), (1,0), (0,2) & (2,0). What is the value of linear correlation coefficient?
2dc
F-E<µ<i+E where E = Za/2 •
Formulae Sheet STAT-101-2
d.f. =min (n
f917
Residual = observed y –
– 1, n2 – 1)
2dcf917
Jn
-
p-E<p<p + E where E =
a/22
Point estimate =
U.C.L.+ L.C.L
nExy-(Ex)(Ey)
n Ex²-Ex)²/n Ey²-(Ey)²
The regression equation ŷ = bo + bịx,
2
%3D
= Z
pa
Margin of ETor, E =
upper C.L.-lower C.L.
72
%3D
12
Za/2
2
n =
X1+x2
ī-E <µ < ã + E where E = t a½· J |y-intercept, bo
bo = アーb
n+n2
nExy)-(Ex)Ey)
nEx²)-Ex)²
Slope, b,
%3D
||
Ey)(Ex²)-Ex)Exy)
nEx²)-(Ex)2
b; =r.
%3D
t =
Sx
F
t = (X – x,)/si+
Sn
%3D
t =
a. - 0.41
n2
ce62 017
MacBook Pro
ce36zdcf917
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