Use paired data tests - graph-supported reasoning
For paired data in a school survey, the mean difference is \(2.4\), the standard deviation of differences is \(1.9\), and \(n=15\). Calculate the paired test statistic. Enter the requested value and choose the interpretation that matches the result.
Worked practice: result and interpretation
Calculate the requested result first, then choose the interpretation that follows from it.
Write a full answer
Now write the response in full, in your own words — this is what the exam asks for. The AI marks it on the same moves you built above (focus, evidence, technique, judgement) and gives feedback on reasoning, evidence, and expression.