Math (Stats)

In order to predict y-values using the equation of a regression line, what must be true about the correlation coefficient of the variables?

A. The correlation between variables must be an x-value of a point on the graph.

B. The correlation between variables must be significant.

C. The correlation between variables must be a y-value of a point on the graph.

D. The correlation between variables must be greater than zero.

  1. 👍 0
  2. 👎 0
  3. 👁 1,649
  1. So, what does the correlation coefficient tell you about the accuracy of the regression line?

    1. 👍 0
    2. 👎 0
  2. Well we only use the regression line for predictions if the regression is a reasonable fit for the data, the correlation coefficient is significant, and the data for the predicted values do not go beyond the scope of the data used to estimate the regression.

    B

    1. 👍 0
    2. 👎 0
  3. I agree

    1. 👍 0
    2. 👎 0
  4. egg

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. graphing

    Q: How could the function y=3t^2 +4 be plotted on a cartesian graph to produce a straight line? What would be the numerical values of the slope and the intercept of the line? For this it's explained in the lab book for physics as

  2. Algebra

    1.Is the equation true false or open ? 9p+8=10p+7 A. Open; there is a variable B. True; the expression are the same for all values of the vaiables. False; the expression are never the same 2.Which is the solution of the equation

  3. Math

    A perfect positive or negative correlation means that A) the explanatory causes the y-variable. B) 100% of the variation is explained. C) we get the same regression equation if we switch the x and y variables. D) the slope of the

  4. STAT - Please check answer

    In a study, nine tires of a particular brand were driven on a track under identical conditions. Each tire was driven a particular controlled distance (measured in thousands of miles), and afterward the tread depth was measured.

  1. Statistics

    The following linear equation, y = b0 + b1x, is a regression line with y-intercept b0 and slope b1. Define These Terms 1) correlation coefficient 2) Linear regression equation

  2. Math

    Find the equation of the regression line and predict y when x = 2.5. x - 1 5 4 2 3 6 y - 25 5 10 20 15 5

  3. Statistics

    In a study, nine tires of a particular brand were driven on a track under identical conditions. Each tire was driven a particular controlled distance (measured in thousands of miles), and afterward the tread depth was measured.

  4. Math

    Q: How could the function y=3t^2 +4 be plotted on a cartesian graph to produce a straight line? What would be the numerical values of the slope and the intercept of the line? For this it's explained in the lab book for physics as

  1. Statistics

    Determine the regression line of x+2y-5=0 and 3x+3y-8=0 (i) y on x and (ii) x on y, (iii) Find r using the regression coefficients

  2. Math/Statistics

    The number of megapixels in a digital camera is one of the most important factors in determining picture quality. But, do digital cameras with more megapixels cost more? The following data show the number of megapixels and the

  3. math - regression line - thank you

    The question states: Plot the regression line from D = 40 to D = 300. My question: Do you extend the line beyond those 2 points (as in going towards the axis) or does the regression line just connect those 2 points like a line

  4. Calculus

    For what values of x is the tangent line of the graph of f(x)=8x3+36x2+46x−72 parallel to the line y=−2x+1.9 ? Enter the x values in order, smallest first, to 4 places of accuracy: x1= ≤ x2=

You can view more similar questions or ask a new question.