Which one of the following is a good candidate to forecast the cyclical component for the future?...
Let r be the correlation coefficient. Denote the explanatory variable by X and the responsible variable by Y . Which statement is correct ? (A) Positive r indicates a perfect linear relationship between X and Y . (B) r is always a number between 0 and 1. (C) r is almost 0 if values of X’s and Y ’s are all positive. (D) The correlation of variables −X and Y is −r. (E) None of the above.
Multiple Choice The high level of sales that department stores experience during Christmas is an example of what component of a time series? Trend Cyclical Seasonal Irregular Questions 2 – 5 refer to the following time series: Year: 0 1 2 3 4 Sales: 12 14 19 23 18 The value of the three-year centered moving average that corresponds to year 1 will be 15. 14. 18.7. 13.3. The value of the four-year centered...
1. Which of the following is correct? A. In correlation analysis there are two variables and both are dependent B. I n correlation analysis there are two variables and both are independent C. I n regression analysis there are two variables and both are dependent D: In regression analysis there are two variables and both are independent 2. measures the strength of linear association between two variables. A. Regressor B. Regressand C. Correlation coefficient D. None 3. the independent variables....
1. Which of the following conditions will lead to a smaller variance for the intercept estimator for your multiple regression model? (A) X values cluster far from the origin of the X axis (B) X values closely pack around the mean of X in your sample (C) Small sample sizes (D) High correlation among the explanatory variables (E) Small error variance in the population regression function 2. R-squared (A) measures the proportion of variability of the dependent variable that is...
sseument Part& Pretected Viei)Word Mailings Review View Help Tell me what you want to do Enable Editing ruses. Unless you need to edit, it's safer to stay in Protected View 1. Two variables have a strong negative correlation. Which of the following statements is not true? a. the dependent variable decreases as the independent variable increases b. the trend of the data exhibits an irregular decline c. the line of best fit has a negative slope d. most data points...
1. State whether the following statements are true or false. _1. The value of b in the regression equation is known as the intercept. 2. The more the points are separated in a scatter diagram, the greater the degree of association between the variables. 3. The main reason for expressing the relationship between two variables through a regression equation is to be able to estimate the value of one variable when the value of another is known. 4. The closer...
I have to submit a term paper which involves conducting a regression and correlation analysis on any topic of my choosing. The paper must be based on yearly data for any economic or business variable, for a period of at least 20 years. The following also must be included in the paper: • The term paper should distinguish between dependent and independent variables; determine the regression equation by the least squares method; plot the regression line on a scatter diagram;...
2. What is the coefficient of correlation between miles per gallon and weight? What is the sign of the correlation coefficient? Does the coefficient of correlation indicate a strong correlation, weak correlation, or no correlation between the two variables? How do you know? See Step 3 in the Python script. 3. Write the simple linear regression equation for miles per gallon as the response variable and weight as the predictor variable. How might the car rental company use this model?...
A data set includes weights of garbage discarded in one week from 62 different households. The paired weights of paper and glass were used to obtain the results shown to the right. Is there sufficient evidence to support the claim that there is a linear correlation between weights of discarded paper and glass? Use a significance level of a = 0.05. Correlation matrix: Variables Paper Glass 10.1379 Glass 0.1379 Click here to view a table of critical values for the...
MULTIPLE CHOICE. Choose the one alternative that best completes the statement or answers the question. 1) Which of the following is true for instrument? A) The set of instruments are said to be weak when the number of instruments are stricly superion to the number of endogenous regressors. B) A valid instrument should be an exogenous variable. C) When the first stage F-statistic is less than 10, then the set of instruments are not weak. D) Anderson-Rubin-based confidence intervals are...