Reference no: EM13983154
1. Develop the correlation matrix showing the correlation between all possible pairs of variables. Test statistically to determine which independent variables are significantly correlated with the dependent variable, book sales. Use a significance level of 0.05.
2. Develop a multiple regression model containing all four independent variables. Show clearly the regression coefficients. Write a short report discussing the model. In your report make sure you cover the following issues:
a. How much of the total variation in book sales can be explained by these four independent variables? Would you conclude that the model is significant at the 0.05 level?
b. Develop a 95% confidence interval for each regression coefficient and interpret these confidence intervals.
c. Which of the independent variables can you conclude to be significant in explaining the variation in book sales? Test using a = 0.05.
d. How much of the variation in the dependent variable is explained by the independent variable? Is the model statistically significant at the a = 0.01 level? Discuss.
e. How much, if at all, does adding one more page to the book impact the sales volume of the book? Develop and interpret a 95% confidence interval estimate to answer this question.
f. Perform the appropriate analysis to determine the aptness of this regression model. Discuss your results and conclusions.
|
Answer the multiple choice questions
: Chemicals and other hazardous substances have been used for a variety of reasons for about the last 500 years.
|
|
Determining the stepwise regression model
: Looking carefully at the stepwise regression model, you can see that the value of the slope coefficient for variable x2, family income, changes as a new variable is added to the regression model. Discuss why this change takes place.
|
|
Determine the period of small oscillation
: A simple pendulum of length 2.00 m and mass 0.425 kg has a spring of force constant 88.0 n/m attached a distance h = 1.2 m from the point of suspension. determine the period of small oscillation.
|
|
What angle again measured from the vertical
: A simple pendulum of length L is displaced from the vertical by 8.00 degrees and released from rest. At what angle, again measured from the vertical, is the pendulum's kinetic energy equal to 40.0 percent of its maximum kinetic energy? Assume the ..
|
|
Correlation between all possible pairs of variables
: 1. Develop the correlation matrix showing the correlation between all possible pairs of variables. Test statistically to determine which independent variables are significantly correlated with the dependent variable, book sales. Use a significance..
|
|
Construct a regression equation
: Construct a regression equation in which total U.S. box office grosses are predicted using the other variables. Produce the appropriate residual plots to determine if the linear function is the appropriate regression function for this data set.
|
|
Estimate of regression equation using same variables
: a. Construct an estimate of the regression equation using the same variables. b. Produce the appropriate residual plots to determine if the linear function is the appropriate regression function for this data set.
|
|
What is the direction of the current induced in the loop
: What is the direction (clockwise or counterclockwise) of the current induced in the loop? Calculate the magnitude of the external force Fext required to move the loop at a constant speed of v = 3.9 m/s.
|
|
What will be the speed of the pendulum at the instant
: Suppose you start with the pendulum hanging vertically, at rest. You then give it a push so that it starts swinging with a speed of 8.1 m/s. What maximum angle (in degrees) will it reach, with respect to the vertical, before falling back down?
|