Scientists use complicated methods with statistics (a kind of mathematics) to calculate if the result of an experiment is within the range of what might happen by chance, or is sufficiently different that the probability is high that it was caused by the experimental change.
(Scientists; use; complicated methods with statistics; to calculate if the result of an experiment is within the range of what might happen by chance, or is sufficiently different that the probability is high) (the probability; is; high) (it; was caused; by the experimental change) (the result of an experiment; is; ) (the result of an experiment; is; sufficiently different that the probability is high)
Scientists the probability it the result of an experiment the result of an experiment
use is was caused is is
complicated methods with statistics to calculate if the result of an experiment is within the range of what might happen by chance, or is sufficiently different that the probability is high
high
by the experimental change
sufficiently different that the probability is high