The phrase "are based on testing" is correct and usable in written English.
It can be used when discussing conclusions, results, or decisions that derive from experimental or evaluative processes.
Example: "The findings of this study are based on testing conducted over a six-month period to ensure accuracy."
Alternatives: "are grounded in testing" or "are derived from testing."
It's "for use with vehicles that are at least two years old and have 12-volt systems," and it appears that the claims are based on testing performed on one vehicle: "An independent automotive testing service showed the unit increased a test vehicle's average fuel efficiency from 23.8 to 28.1 miles per gallon in two weeks".
The cost estimates are based on testing approximately 30 students once in a given semester.
In the next step, all output decisions are based on testing all rules in a FIS.
The p-values are based on testing the ratio of mean squares for a factor (like 'mask') and the mean square of errors (random fluctuations), assuming that ratio is F-distributed.
The current conventional methods for determining drug susceptibility are based on testing isolates rather than direct testing of organisms in patient specimens.
Planned comparisons are based on testing a specific hypothesis that centers around a defined set of gene families and rests on known, validated outcomes from prior work, in this case involving both in vivo and in vitro demonstrations of oxidative stress from the organophosphates.
Isha Yoga programs are based on tested, scientific principles.
The insulin regimens are based on tested algorithms for dose adjustment.
But that assumption is based on testing kidney function by measuring serum creatinine levels, a measure too crude to pick up subtle deficiencies in function.
The evaluation was based on testing critical mechanical and other functional properties of the films.
Our study is based on testing three basic hypotheses.
