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Benito carried out some research into the effects of day care on children’s behaviour - AQA - A-Level Psychology - Question 11 - 2017 - Paper 2
Question 11
Benito carried out some research into the effects of day care on children’s behaviour. He recorded the number of aggressive acts children displayed. The children who... show full transcript
Worked Solution & Example Answer:Benito carried out some research into the effects of day care on children’s behaviour - AQA - A-Level Psychology - Question 11 - 2017 - Paper 2
Step 1
(i) State which statistical test Benito would use to analyse his data.
Answer
Benito would use the Independent Samples t-test to analyze his data. This test is appropriate as he is comparing the means of two independent groups: children who attended full-time day care and those who did not.
Step 2
(ii) State three reasons why Benito would use the statistical test you identified in (i).
Answer
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Comparison of Means: The Independent Samples t-test allows Benito to determine if there is a statistically significant difference between the mean aggressive acts of the two groups.
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Independent Groups: The two groups (full-time and part-time day care attendees) are independent of each other, making this test suitable.
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Normal Distribution Assumption: If the sample sizes are sufficient, the t-test assumes that the data will follow a normal distribution, which is relevant for measuring aggressive acts.
Step 3
Describe how he would have selected his sample.
Answer
Benito would have used a random sampling technique. He could have done this by listing all the children in the population he wants to study, then using a random number generator to select a subset of those children. This ensures each child has an equal chance of being selected, minimizing bias and aiding in the generalizability of his findings.