Choose the right answer? 1-Which of the following statements is (are) not true a
ID: 3129004 • Letter: C
Question
Choose the right answer?
1-Which of the following statements is (are) not true about regression model?
a-The intercept coefficient is not typically interpreted.
b-Estimates of the slope are found from sample data.
c-The dependent variable is the explanatory variable.
d-The regression line minimizes the sum of squared errors.
2-In a simple linear regression analysis the quantity that gives the amount by which Y ( response variable) changes for a unit in X (explanatory variable) is called the
a-Correlation coefficient.
b-Slope of the regression line.
c-Coefficient of determination.
d-Y-intercept of the regression line.
3-In order for a linear programming problem to have a unique solution, the solution must exist.
a-At the intersection of non-negativity constraints.
b-At the intersection of two or more constraints.
c-At the intersection of objective function and a constraint.
d-At the intersection of non-negativity and a resource constraint.
4-If the service rate decreases as the arrival rate remains constant, then in general.
a-Service costs increases
b-Customer waiting time decreases
c-Customer waiting time increases
d-Customer satisfaction increases
5-A feasible solution to a linear programming problem
a-Must give the maximum possible profit.
b-Must be a corner point of the feasible region.
c-Must satisfy all the problem’s constraints simultaneously.
d-Need not to satisfy all the constraints, only the non-negativity constraints.
Explanation / Answer
1) a-The intercept coefficient is not typically interpreted.
2) b-Slope of the regression line.
3) b-At the intersection of two or more constraints.
4) c-Customer waiting time increases
5) c-Must satisfy all the problem’s constraints simultaneously.