Answer:
1.8 ; 11.8 ; 4.18
Step-by-step explanation:
Given the data:
X : 2.4,1.6, 3.2,0.3, 1.5
Mean, m = Σx / n
Σx = 9 ; n = 5
m = 9 /5
m = 1.8
If data is increased by 10:
X : 12.4, 11.6, 13.2, 10.3, 11.5
Σx = 59 ; n = 5
m = 59 /5
m = 11.8
If data values is doubled :
X : 5.76, 2.56, 10.24, 0.09, 2.25
Σx = 20.9 ; n = 5
m = 20.9 /5
m = 4.18
Slope: m = 0
Equation: y = 3
The equation of a line has the following format:
In which m is the slope.
We choose two points which the equation crosses.
I am going to choose (0,3) and (1,3)
(0,3)
When x = 0, y = 3. So
(1,3)
When x = 1, y = 3. So
must also be positive
The sign of the correlation coefficient indicates whether the fitted line is sloping upwards or downwards, so it should be consistent with the sign of the slope of the fitted line. so if the correlation line is poitive so should the regression line
We shall first of all, convert all the numbers to the same base. This means we either;
Convert the fractions to decimals OR
Convert the decimals to fractions
Let us therefore convert the decimals to fractions.