Which of the following factors would definitely improve the accuracy of your predictions? Select all that apply.
1) having a hypothesis that is more general and less specific
2) having a hypothesis that is less general and more specific
3) using a smaller data set
4) using a larger data set
5) using shoe size data for men only
6) using shoe size data for women only
7) having an equal number of males and females in the data set
8) using separate data sets for men and women
