general khan, honerlaw, honerlaw_study
2. hw2, hw2_data, graphical, q2 (hw2_data with day 2 classroom work: hw2_data_v1)
3/4. measures of central location and dispersion (hw2_data with day 3 classroom work: hw2_data_v2) (hw2_data with day 4 classroom work: hw2_data_v3) hw3 hw3_data hw4 hw4_data
5/6. hmwk5_n_6, hw5n6_data, honerlaw, bivariate: scatter plots, correlation, regression
