An inference
a. is a possible explanation for events using prior knowledge
b. explains if a hypothesis is or is not valid
c. is made independent of observation or prior knowledge
d. can be either qualitative or quantitative
user: a student conducts an experiment to determine how the amount of water given to a plant affects its growth.
which of the following is not a control for this experiment?
a. the type of plant
b. the amount of soil
c. the amount of water
d. the amount of time