Soluiton-4:
slope=5.6
changeiny /change in x=5.6
for unit hour increase in reading ,IQ increases by 5.6
ANSWER:
a unit point change in reading label will increase IQ by 5.6 point
Solution-5:
Muliticollinearity is rraltionship between independent variables
mesuared by VIF
VIF > 10 means multicolinear
ANSWER
Measured using a measure called VIF
Solution-6:
Ho there is no linear relationship between profit and sales
Ho:
Ha:there is a linear relationship between profit and sales
Ha:
ANSWER:
there is no linear relationship between profit and sales
Question 4 1.5 pts Which of the following statement is true based on the following regression...
Answer both questions please true or false 16. The slope of the simple linear regression equation represents the average change in the value of the dependent variable per unit change in the independent variable (X). True/False 19. When using simple regression analysis, if there is a strong correlation between the independent and dependent variable, then we can conclude that an increase in the value of the independent variable causes an increase in the value of the dependent variable.
Question 8 1.5 pts Which of the following is true about interpretation? We only need to interpret our finding from a regression analysis. None of the answers are correct. We don't need to revisit our original question once we have performed an interpretation. Interpretation only needs to be done when we have finished all our analytics tasks. Question 9 1.5 pts When we utilize a visualization on paper/screen, that visualization is limited to exploring: Relationship among an infinite number of...
O a nominal variable with three or more values O a new regression coefficient 0.5 pts DQuestion 12 The variance inflation factor (VIF) is used to select or remove independent variables to reduce the effects of multicollinearity in a multiple regression equation O True e False D Question 13 0.5 pts If the hypothesis Ho: B1- 0 is rejected, then the sample regression coefficient b1 indicates the change in the predicted value for a unit
i need help O Achange in profitability Question 12 1 pts In a linear regression, the regression coefficients on the independent variables represent the marginal impact of a change in the independent variable upon the dependent variable, holding the values of all other independent variables constant () the marginal impact of a change in the independent variable upon the other independent variables, holding the value of the dependent variable constant O the marginal impact of a change in the independent...
Question 15 1 pts In a simple regression analysis (where y is a dependent and x an independent variable), if the y intercept is zero, then O the slope must be negative. o the slope can be positive, or zero, or negative. O there is no relationship between x and y. o the slope must be positive.
A multiple linear regression model based on a sample of 30 weeks is developed to predict standby hours based on the total staff present and remote hours. The SSR is 24672.31and the SSE is 32019.36. Complete parts (a) through (d) below. a. Determine whether there is a significant relationship between standby hours and the two independent variables (total staff present and remote hours) at the 0.05 level of significance. What are the correct hypotheses to test? H0:________________ H1: ________________ Calculate...
Chapter 10 13. The further the hypothesized mean is from the actual mean the lower is the power of the test. 14. The manager of the quality department for a tire manufacturing company wants to know the average tensile strength of rubber used in making a certain brand of radial tire. She knows the population standard deviation and uses a Z test to test the null hypothesis that the mean tensile strength is 800 pounds per square inch. The calculated...
please answer all question (2-5) thanks Question 2 1 pts As the number of hours a student studies increases, the number of errors made on the exam decreases. There is a strong relationship between these variables. Select the value for the pearson correlation (r) that would be appropriate 0-0.7 0-0.4 o 0.6 o 1.0 Question 3 1 pts The following APA summary was reported for a one-sample t-test (two-tailed, alpha = .05). t(15) = 3.3, p = .003 Which of...
Please find the partially completed multiple regression analysis below, which explores the relationship between the sales (in hundreds) and the independent variables price(in dollars), promotional expenditure(in hundreds of dollars) and the quality score ( 0-100) for a very popular Christmas season toy. A) Is the factor Promotional Exp significant at α=0.05 ? Perform the test of hypothesis and show all the relevant calculations. (10 points) B) Construct a 95% confidence interval estimate of the population slope of sales with Quality...
please answer it quikly this quizz has time frame Topic Task 11: Regression and Correlation Data Sheet This data and record sheet is required for you to complete the online Topic Task. Please print this sheet BEFORE you attempt to open the Topic Task 11. You will need this information in front of you when doing the task. You will also need a pencil/pen and your calculator Do not clear the data from your calculator between questions, as you will...