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Reporting the results:

 

Bird migration example

The number of migrating raptors observed hourly (Figure 1) is significantly different from what we would expect if there was no change in the number of migrating birds during the day. (One-way Chi-square: X2 = 168.3, df = 8, N = 675, P < 0.05)

bar chart of raptor numbers versus time of day

Figure 1. Total number of migrating raptors observed in each one hour block over 6 days of observations at Hawk Mountain