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Nadiya and Tamal are analysing data they have gathered about students’ exam scores and the number of missed classes - AQA - A-Level Psychology - Question 8 - 2017 - Paper 1
Question 8
Nadiya and Tamal are analysing data they have gathered about students’ exam scores and the number of missed classes. Table 3 shows the raw data from Nadiya and Tama... show full transcript
Worked Solution & Example Answer:Nadiya and Tamal are analysing data they have gathered about students’ exam scores and the number of missed classes - AQA - A-Level Psychology - Question 8 - 2017 - Paper 1
Step 1
Draw a scatter diagram to show Nadiya and Tamal’s data.
Answer
To create the scatter diagram, plot the exam scores on the x-axis and the number of missed classes on the y-axis. Each data point corresponds to a student's exam score and the respective number of missed classes. For example, the point (70, 8) represents a student with an exam score of 70 and 8 missed classes. After plotting all given points, the scatter diagram will illustrate the relationship between these two variables visually.
Step 2
Step 3
State two reasons why they used Spearman’s rho to analyse their data.
Answer
- Spearman's rho is used because it assesses the strength and direction of the association between two ranked variables, making it suitable for non-parametric data.
- It is less sensitive to outliers compared to Pearson's correlation coefficient, providing a more robust measure when dealing with potentially skewed data distributions.