?Kepler’s Law of Planetary Motion The time it takes for a planet to complete its orbit around the sun is called the planet’s sidereal year. Johann Kepl

Chapter 14, Problem 23

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Kepler’s Law of Planetary Motion The time it takes for a planet to complete its orbit around the sun is called the planet’s sidereal year. Johann Kepler studied the relation between the sidereal year of a planet and its distance from the sun in 1618. The following data show the distances that the planets are from the sun and their sidereal years.

(a) Determine the least-squares regression equation, treating distance from the sun as the explanatory variable.

(b) A normal probability plot of the residuals indicates that the residuals are approximately normally distributed. Test whether a linear relation exists between distance from the sun and sidereal year.

(c) Draw a scatter diagram, treating distance from the sun as the explanatory variable.

(d) Plot the residuals against the explanatory variable, distance from the sun.

(e) Does a linear model seem appropriate based on the scatter diagram and residual plot? (Hint: See Section 4.3.)

(f) What is the moral?

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