Which procedures were followed in this lab to decrease experimental error? Check all that apply.
using only two types of seeds, both from the same source
having one student count every sprout in every quadrat
using adjacent plots of land for both groups
increasing the sample size by combining data from multiple groups
repeating the experiment indoors under growth lights
measuring plant height the same way and at the same time for both groups
using only two types of seeds, both from the same source, repeating the experiment indoors under growth lights, and measuring plant height the same way and at the same time for both groups
