Hello again guys,
Heres a matrices question aswell as a core one..
For the core one i have no idea why the answer gave would best suit the stem and leaf plot, as i believe distance travelled would be a better answer...
For the matrices one, i have only seen this question once, and im confused on how to do it. If anyone has any idea on the theory behind it, or atleast the method of solving any question like that, i will be grateful.
For the Core question, the one that make the most sense is answer E, which is Driver's sex male or female. Since you're sort of comparing only two things side by side (Categorical variable) and average speed in km/hr (numerical variable) the best suited would be a back to back stemplot, given that there is 1) a categorical variable and a numerical variable. and 2) Since there is only two categories, Male and female. Distance travelled won't really work since it is a numerical variable as well. A back to back stemplot is designed for a categorical and numerical variable.
For the Matrices one, you want to know how many eggs, baby trout and adult trout, that could be added or removed at the pond of each year will allow the population to remain constant.
For this question you firstly have to find S
1 and once you do that you takeaway S
1 from S
0. Basically S
0-S
1 Once you found that difference, you know that if you add that amount every year, the population will remain constant.
Not great at explaining that one, but if you need further explanation let me know.
EDIT: Law already answered