. 2019 Jun 6;14(6):e0217914. doi: 10.1371/journal.pone.0217914

Table 3. IPHs per day in N₁(t) and N₂(t): Frequencies observed and expected from a Poisson process.

#	Observed N₁(t)	Expected N₁(t)	Observed N₂(t)	Expected N₂(t)
0	1509	1502.67	1915	1912.7
1	268	280.45	271	274.6
2	32	26.17	20	19.71
3	2	1.63	2	0.94
4	0	0.08	0	0.03

Table 3. IPHs per day in N1(t) and N2(t): Frequencies observed and expected from a Poisson process.