Table 2. Results from a in The Lyckholm acme of cephalopods - Review of the late Katian (Vormsi-Pirgu regional stages) Ordovician cephalopods of Estonia

Table 2. Results from a two sample Student’s t-test between x: combined measurements from Strand’s (1934) type specimens of Discoceras hyatti Strand, 1934, and Discoceras saemanni (Hyatt, 1894) (n = 25) and y: Estonian specimens assigned to Discoceras saemanni, herein (n = 157). The null hypothesis that the means of the two populations are equal cannot be rejected for WER.
t-statisticdegrees of freedomp-valuemean xmean yWER-1.699.190.132.092.25WWI4.0037.7<0.0051.281.72