Assessing analysis, evaluation and conclusions in scientific investigations

5 questions

Students are assessed on their ability to analyse data, evaluate methods and draw valid conclusions.

Questions

1. A researcher records the height of plants grown under three light conditions. The mean heights are: Red light 12 cm, Blue light 15 cm, White light 14 cm. Which conclusion is best supported by the data?
2. When evaluating the reliability of an experiment measuring reaction time, which change would most improve reliability?
3. A p‑value of 0.04 indicates that there is a 4% probability that the null hypothesis is true.
4. A line graph shows the temperature of a solution over time. At 5 minutes the temperature drops sharply before rising again. Which is the most likely source of error?
5. After analysing the data, the scientist states that the hypothesis is disproved and suggests a new hypothesis. Which aspect of scientific practice does this demonstrate?