Educational Studies in Mathematics, Vol. 93, No. 3 (November 2016), pp. 333-361 (29 pages) Algebra has been explicit in many school curriculum programs from the early years but there are competing ...

Let x and y follow a normal bivariate probability function with means $\bar X, \bar Y$, standard deviations σ1, σ2, respectively, r the coefficient of correlation, and $\rho_1 = \bar X/\sigma_1, ...

4 Department of Clinical Science, Intervention and Technology, Karolinska Institutet, Stockholm, Sweden 5 Department of Physiology & Pharmacology, Karolinska Institutet, Stockholm, Sweden ...