A pediatrician wants to determine the relation that exists between a child's height (x) and head circumference (y). She randomly selects 11 children from her practice and measures their height and head circumference in inches. She finds that the correlation is 0.6 and the regression equation is y = 0.221x + 8.15 What proportion of the variation in head circumference can be explained by the variation in the values of height? % Report answer as a percentage accurate to one decimal place.

Interpret the regression coefficient of X3 in relation to the Y ( X3 unit is mile)  Y =  58.286 + 13.7604 * X3

Analysis of the relationship between the fuel economy (combinedMPG) and displacement (in liters) for 1262 models of cars produces the regression model combinedMPH = 33.472 - 3.317Displacement. Explain what the slope means.

Heights and answers to the question, "How much would you like to weigh?" were recorded for n=126 women in a statistics class. A regression equation for y=desired weight (in pounds) and x=height (in inches) is Estimated mean desired weight= - 65.4 + 2.90 (Height) D = bo + bịx a. What is the value of the slope of this regression equation?

Using your favorite statistics software package, you generate a scatter plot with a regression equation and correlation coefficient. The regression equation is reported asy=29.62x+64.57y=29.62x+64.57and the r=0.784r=0.784.What proportion of the variation in y can be explained by the variation in the values of x? r² = %Report answer as a percentage accurate to one decimal place.

A regression was run to determine if there is a relationship between hours of tv watched per day (x) and number of sit-ups a person can do (y)

I need the right answer to this problem.

From a regression equation r2= 0.39 and the slope = -2.8 What is the linear correlation coefficient r?

Using your favorite statistics software package, you generate a scatter plot with a regression equation and correlation coefficient. The regression equation is reported asy=−70.72x+75.04y=-70.72x+75.04and the r=−0.195r=-0.195.What proportion of the variation in y can be explained by the variation in the values of x?r² = %Report answer as a percentage accurate to one decimal place.

The following table shows economic development measured in per capita income PCINC. Year PCINC Year PCINC 1870 339 1920 1,040 1880 490 1930 1, 166 1890 591 1940 1,362 1900 747 1950 1, 842 1910 918 1960 2, 123 Table 12.7 a. What are the independent and dependent variables? The independent variable is the and the dependent variable is the yesar pr pla me b. Which of the following is the correct scatterplat for the data above? 2500 2 2000- a 1500 1000- A 500- 1980 1920 X- year 1880 1940 1960 1900 2500 2000- 1500 1000- a 500- 1880 1900 1920 1940 1960 1980 X- year 2500- 2000- 1500 1000 500 1880 1900 1920 X- year 1940 1960 2500 2000- 1500 1000 500 1880 1900 1920 1940 1960 1980 X-year aucoM eyndeo ad - d