The diameter of a planet is the distance through the center of the planet from one point on the equator to the opposite side. The diameters (in thousands of kilometers) of the 8 planets in our solar system are described by the boxplot in Fig. 108.

a. Given that the distribution is unimodal, is it skewed left, skewed right, or symmetric? Which is a better measure of the center, the mean or the median? Explain.
b. Estimate the median diameter. What does it mean in this situation?
c. Estimate Q1. What does it mean in this situation?
d. A student says there are more planets that have diameters between 31 thousand kilometers and 86 thousand kilometers than there are planets that have diameters less than 31 thousand kilometers, because the right part of the box in Fig. 108 is longer than the combined length of the left whisker and left part of the box. What would you tell the student?
e. The diameter of Earth is approximately 13 thousand kilometers. On the basis of Fig. 108 alone, how many planets can you say have diameters larger than Earth€™s for certain?

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Diameters 0 20 40 60 80 100 120 140 160 Thousands of kilometers