X 1 3 5 3 4 4 Y 2 5 4 3 4 6 A: Plot...

X	1	3	5	3	4	4
Y	2	5	4	3	4	6

A: Plot the date

B: find the line of best fit

C: determine ŷ AT x=3

D: Find r and r^2

E: explain r and r^2

Expert Solution

Solutions:-

Data table:

X	1	3	5	3	4	4
Y	2	5	4	3	4	6

In regression equation put x = 3

Y = 1.857 + 0.643*3

Y = 3.786

r = 0.6211

So,

r^2 = 0.385765521

r^2 ~= 0.3858

Please like(Rate):

orchestra answered 1 year ago

ID X Y 1 2 3 2 3 6 3 4 6 4 5 7 5...

ID X Y 1 2 3 2 3 6 3 4 6 4 5 7 5 8 7 6 5 7 7 6 7 8 8 8 9 7 8 10 12 11 Test the significance of the correlation coefficient. Then use math test scores (X) to predict physics test scores (Y). Do the following: Create a scatterplot of X and Y. Write the regression equation and interpret the regression coefficients (i.e., intercept and slope). Predict the physics score for each....

2. Consider the following data: x= 1, 2, 3, 4, 5 y =3, 2, 4, 6,...

2. Consider the following data: x= 1, 2, 3, 4, 5 y =3, 2, 4, 6, 5 By hand, not using Matlab, and showing your work: (a) Compute the correlation coefficient. (b) Find the least-squares line. (c) Find the standard deviation around the least-squares line.

1) Define the sets X ={ 1, 2, 3} and Y = {4, 5, 6}. Now,...

1) Define the sets X ={ 1, 2, 3} and Y = {4, 5, 6}. Now, define the relation R from X to Y by xRy if and only if x − y is even. Find all of the elements in R. 2) Define the relation R on ℤ by mRn if and only if 2|(m − n). Show that R is an equivalence relation.

Consider the following data table: x 8 5 4 6 2 5 3 y 1 3...

Consider the following data table: x 8 5 4 6 2 5 3 y 1 3 6 3 7 2 5 (15 points) Create a scatterplot of the data either by hand or with a computer. Does there appear to be a linear relationship between x and y? If so, what is the strength and direction of the relationship? (20 points) Give the Simple Linear Regression Model, using x as the predictor variable and y as the response variable. What is the meaning...

use a matlab built-in function to numerically solve: dy/dx= -x^2+((x^3*e^-y)/4) for 1<=x<=5 with y(1)=1 plot the...

use a matlab built-in function to numerically solve: dy/dx= -x^2+((x^3*e^-y)/4) for 1<=x<=5 with y(1)=1 plot the solution

Returns on stocks X and Y are listed below: Period 1 2 3 4 5 6...

Returns on stocks X and Y are listed below: Period 1 2 3 4 5 6 7 Stock X 3% -2% 9% 6% -1% -4% 11% Stock Y 1% -4% 7% 12% 3% -2% -1% Consider a portfolio of 20% stock X and 80% stock Y. What is the (population) variance of portfolio returns? Please round your answer to six decimal places. Note that the correct answer will be evaluated based on the full-precision result you would obtain using Excel.

Returns on stocks X and Y are listed below: Period 1 2 3 4 5 6...

Returns on stocks X and Y are listed below: Period 1 2 3 4 5 6 7 Stock X 5% 6% -2% -4% 6% 10% 7% Stock Y 1% -3% 6% 3% 12% 7% -5% Consider a portfolio of 40% stock X and 60% stock Y. What is the (population) variance of portfolio returns? Please round your answer to six decimal places.

Returns on stocks X and Y are listed below: Period 1 2 3 4 5 6...

Returns on stocks X and Y are listed below: Period 1 2 3 4 5 6 7 Stock X 5% 6% -2% -4% 6% 10% 7% Stock Y 1% -3% 6% 3% 12% 7% -5% Consider a portfolio of 40% stock X and 60% stock Y. What is the (population) variance of portfolio returns? Please round your answer to six decimal places. Note that the correct answer will be evaluated based on the full-precision result you would obtain using Excel.

x 2 8 5 9 4 3 9 6 7 8 y 3 6 5 7...

x 2 8 5 9 4 3 9 6 7 8 y 3 6 5 7 9 7 4 6 9 9 -5.48x + 0.17 5.48x + 0.17 -0.17x + 5.48 0.17x + 5.48

Step 2 Data Set A x 1 2 3 4 5 6 7 y 7 7...

Step 2 Data Set A x 1 2 3 4 5 6 7 y 7 7 7 9 9 9 10 Data Set B x 1 2 3 4 5 6 7 8 9 10 11 y 4 6 6 6 8 9 9 9 10 10 10 Step 2 Find the equation for the least-squares line, and graph the line on the scatter plot. Find the sample correlation coefficient r and the coefficient of determination r2. Is r significant?...

Question

X 1 3 5 3 4 4 Y 2 5 4 3 4 6 A: Plot...

Solutions

Expert Solution

Related Solutions