A scientist wants to study the effects of morning temperatures on flower width. Which is most likely a source of error in this scientific experiment?
The distance calipers were recalibrated before each data collection session.
The control group flowers were a day older than the experimental group flowers.
The measurement units were not converted during the data analysis phase.
The flower width data were collected at about the same time every day.

Question

dude · Answer

Remember that the treatment should all be the same in both groups. You cannot change another variable if you are already studying temperature