A marine biologist conducted a study in 2015 to investigate the primary diet of green sea turtles in a coastal lagoon. Out of a sample of 150 turtles, 55 were classified as primarily consuming seagrass, while the remaining 95 primarily consumed marine algae. In 2024, a new study was conducted with a different sample of 150 green sea turtles in the same lagoon; 105 were classified as primarily consuming seagrass, while 45 primarily consumed marine algae.
Identify the statistical test that should be used to determine if there is a significant difference in the dietary preferences of the turtles between the two years. Give three reasons for your choice, referencing the details of the study.
Practise AQA A Level Psychology Inferential testing (A-level only) with exam-style questions for A Level Psychology. 123 questions, matched to the AQA A Level Psychology (7182) specification and written in Paper 1, Paper 2 and Paper 3 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.
