An agricultural biologist wants to determine if a novel seaweed-based bio-stimulant increases the average fruit yield of beefsteak tomato plants compared to a standard synthetic fertiliser.
The biologist sets up a controlled experiment using 12 pairs of genetically identical tomato plants cloned from the same parent plant (to control for genetic variation).
At the end of the harvest season, the total mass of marketable tomatoes (in kg) harvested from each plant is recorded.
Suggest one way the biologist could reduce the probability of making a Type II error in this statistical investigation.
121 exam-style questions on AQA A Level Psychology Inferential testing (A-level only). Each one has a worked solution and a mark scheme showing where the marks go.