Question

Given the following:

X: 1    2    3 4    5

Y: 3    7    5    11    14

Develop a scatter diagram for these data.

Develop the estimated regression equation.

Use the estimated regression equation to predict the value of Y when X = 4

Answer 1

i am using minitab to solve the problem.

copy the data in two column of minitab and name them x and y.

a).steps for scatter diagram :-

graph scatterplot simpleokin Y-variable select y, in X - variables select xok.

the scatter diagram be:-

b).steps for getting regression equation:-

statregression regressionfit regression model is responses select y ,in continuous predictors select xokok.

needed output:-

Regression Equation

y

=

0.20 + 2.600 x

c).the predicted value of Y when X = 4 is:-

= 0.20 + (2.6*4)

= 10.6