Table 2. Statistical analysis of the annual mean temperature in Basel and the number of annual Corylus pollen.

	Variable 1	Variable 2
Mean	10.35102041	1391.32653
Variance	0.766717687	721248.766
Observations	49	49
Pearson correlation	0.585963474
Hypothesized mean difference	0
degrees of freedom	48
t stat	–11.38947702
P (T<=t) one-tail	1.51126E-15
t critical one-tail	1.677224196
P (T<=t) two-tail	3.02253E-15
t critical two-tail	2.010634758

t-test: paired two sample for means.