line of regression formula

The formula for the standard error of the estimate for the predictions made with a regression line is => I or II or III or IV..

Regression should be done only when => r is significant or none of these or regression does not depend on r so can be done disregarding r or r is not significant..

General form of the regression line used in statistics is ____ and the y ′-intercept and the slope respectively are => y ′ = a + bx , a , b or y ′ = ax 2 + b , b , a or y ′ = a + bx 2 , a , b or y ′ = ax + b , b , a..

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..

Which of the following models represents the exponential regression? => y = a + b ln x or y = a · b x or y = ax + b or y = a · x b..

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..

Which of the following statement(s) is/are true? I. A residual is the difference between the actual value y and the mean of the y values y ‾ . II. A regression line is also called a least squares line. III. The coefficient of determination is the ratio of the e..

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..

The mean weights of 100 infants who were weighed each month during their first year of life are shown here. Determine the equation of the regression line and plot the line on the scatter plot. Age (in months) ( x ) 1 2 3 4 5 6 7 8 9 10 11 12 Weight (in pounds) ( y ) 9...