line of regression calculator

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..

The line graph shows the variation in price of a certain product in the consecutive years. Calculate the average price of the product. => $50 or $120 or $100 or None of the above..

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 line plot shows the number of hours Jim spent watching TV each day in a week. Calculate the number of hours he did not watch TV on Wednesday. => 19 or 5 or 20 or 15..

Which of the following statement(s) is/are true? I. If all the points fall on the regression line, the explained variation is equal to the total variation. II. If all the points fall on the regression line, the unexplained variation will be equal to zero. III..

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..

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...