How would you know if you had actually successfully produced the desired trait?

you would know if you had actually successfully produced the desire trait by From cucumbers and carrots to white rice and wheat, we humans have altered ... the odds of producing a crop with a desired trait is akin to winning a lottery. Today scientists can produce a change quickly by selecting a single gene that may ... as dissimilar as bacteria and plants can be successfully inserted into each other.

Explanation:

i don't know if this is right but i hope this helps you very much

the answer is; comparing the frequency of collisions with and without the device

this makes the anti-collision system an independent variable and the collisions a dependent variable. if there are fewer collisions with an anti-collision system that without, then it can be stated that the system is a success. essentially, collisions under an anti-collision system are compared with the frequency of collisions by cars with the human drivers.

this is math not biology xd