The scientist that have collected this data have done so for over 40 years now, the first bar graph that you saw in section one contains finch data from 1973 -1981. Lets see what we can find if we look deeper into the data.
In this data set, "Last Year" is the record of the last year an individual finch was seen by the researchers. This typically means that the individual finch died during that year.
Use the methods you learned in the last activity to compare the finches that died during 1977 with the finches that survived 1977 and answer the questions below.