Match an appropriate correlation for given set of twovariables.
1. Number of siblings & Gender Which one: (Chi-squared,point biserial correlation, spearman's rho, pearson's r, kendallstau)
2. Math scores & Reading score Which one: (Chi-squared,point biserial correlation, spearman's rho, pearson's r, kendallstau)
3. Birth order & Education level  Which one:(Chi-squared, point biserial correlation, spearman's rho, pearson'sr, kendalls tau)
4. Job satisfaction & Annual income Which one: (Chi-squared,point biserial correlation, spearman's rho, pearson's r, kendallstau)
