A

And

Sample size

200

200

Get to the bottom of the grades

201.5 (172.5 - 230)

200.50 (169.00 - 220.00)

Measured results

206.0 (175.0 - 240.0)

205.50 (178.00 - 233.75)

With

−6.040

−9.295

P

<0.05

<0.05