Module 5: Apply 4

Import data

## # A tibble: 94 × 2
##     year how_many_counted
##    <dbl>            <dbl>
##  1  1921                0
##  2  1922                0
##  3  1924                0
##  4  1925                0
##  5  1926                0
##  6  1928                0
##  7  1930                1
##  8  1931                1
##  9  1932                3
## 10  1933                5
## # ℹ 84 more rows

State one question

How has the number of American Crows seen in Ottawa on Christmas changed since 1921?

Plot data

Interpret

The number of American crows appears to begin increasing after 1955 with a peak in 1981 before beginning to decrease again.