They are biased.
Organizations will often fund testing on the basis that the experiments find favorable results for their products. As such, these experiments aren't really indicative as real scientific information.
they may be biased
they may be biased
they may be biased
they may be baised
they may be biased
they may be biased
they may be biased
they may be biased
they may be biased
they may be biased
they may be biased
they may be biased