These tests will be subject to a more stringent level of quality assurance and standardisation and will therefore provide data which is more reliable for the calculation of bands.
Bydd gwaith mwy trylwyr yn cael ei wneud ar y profion hyn o ran sicrhau eu hansawdd ac o ran eu safoni ac, o’r herwydd, byddant yn darparu data mwy dibynadwy ar gyfer cyfrifo bandiau.