regression line

State which of the following statement(s) is/are true. I. Regression analysis is a measure of the relationship between two variables. II. In regression analysis, there are two types of variables, regressor variable and regressed variable. III. The line of ..

Which of the following statement(s) is/are true? I. If the correlation coefficient is significant, the equation of the regression line cannot be determined. II. The values of the dependent variable can be predicted for the values of the independent variable using the regres..

The relation between the sign of the correlation coefficient( r ) and the sign of the slope( b ) of the regression line is => when r is positive, b is also positive and when r is negative, b is also negative or when r is positive, b is negative and when r is negative, b is posit..

The formulas for a and b of the regression line y ′ = a + bx are => II only or III only or IV only or I only..

The age and height of a person is recorded. Determine the equation of the regression line. Age (years) ( x ) 16 18 21 24 28 33 40 Height (feet) ( y ) 5 5.1 5.3 5.55 5.6 5.6 5.6 => y ′ = 4.74 + 0.03 x or y ′ = - 4.74 - 0.03 x or y ′ = - 4.74 + 0.03 x or y &prime..

A group of 10 students attended a class to improve their reading speed. The average reading speed (in words per minute) was measured before and after they took the class. Determine the equation of the regression line. Before class ( x ) 406 350 558 301 259 525 327 312 325 493 Af..

Which of the following statement(s) is/are true? I. A multiple regression equation with three independent variables x 1 , x 2 and x 3 and one dependent variable would have the form y′ = a + b 1 x 1 + b 2 x 2 + b 3 x 3 . II. A multiple regression equation with two independe..

The number of items produced per month and the total costs incurred by a company is shown. Determine the equation of the regression line and plot the line on the scatter plot. No.of items (in 10000) ( x ) 8 3 4 7 6 3 6 8 5 6 4 4 Costs incurred (in 10000 $) ( y ) 10 5 7..

The percentage scores of 6 students in mathematics exam and statistics exam are shown. The equation of the regression line is y ′ = - 14.201 + 1.27 x . Find the coefficients of determination and nondetermination and comment on the variation. Percentage scores in Mathematic..

An experiment was conducted to find out the number of times a tennis ball bounces after it is thrown from a fixed height. This was tried for different heights and the number of times the ball bounced was measured. Determine the equation of the regression line for the data and pr..