Masses and metallicities of exoplanet host stars divided by planet size and number. Square markers indicate the median points of each distribution. Shaded areas are 1σ density contours; solid lines are 2σ contours, and X’s are >2σ outliers. Panel (a): population divided into subsets based on whether the largest detected planet is a Jupiter (red), a Neptune (gold), a sub-Neptune (blue), or an Earth (green). Panel (b): population divided into subsets with no Jupiters (black), exactly one Jupiter (red), exactly two Jupiters (purple), and three or more Jupiters (dark yellow). (The highest number in our dataset is four.)