Is a Person's Degree of Extraversion a Predictor of Romantic

Essay

Is a person's degree of extraversion a predictor of romantic partners? Below are normed data on individuals' degree of extraversion and the number of partners they've had.
$$\begin{array} { c c } \hline \text { Extraversion } & \text { Partners } \\\hline 1.2 & 4 \\1.1 & 3 \\- 0.4 & 2 \\0.5 & 6 \\0.2 & 5 \\0.1 & 3 \\0 & 1 \\- 0.8 & 7 \\- 0.2 & 5 \\- 0.1 & 4 \\- 0.4 & 2 \\0.6 & 8 \\0.2 & 6 \\- 0.1 & 3 \\0.8 & 4 \\- 1 & 5 \\0.9 & 1 \\\hline\end{array}$$ identify a potential hidden variable that may explain the variable that the researcher failed to take into account