In class today, we looked at data about how crabs shed their hard outer shells to grow. We wanted to guess a crab’s size before it shed by using its size after shedding. We made a graph and found that our guess was pretty close (the score was 0.98 out of 1). We noticed some stats about the sizes before and after shedding: the post-shedding data leaned a bit to the left (-2.3469 skewness) and had a peaky distribution (13.116 kurtosis), while the pre-shedding data was also a bit left-leaning (-2.00349 skewness) but less peaky (9.76632 kurtosis).

Both sets of data looked kind of similar on a graph, but with a slight difference in average size. We did a T-test to see if the sizes were really different. The test showed that they were, in fact, different. We also used another method, called ‘Monte-Carlo’, to be extra sure of this difference.