Standardize a normal value
A normally distributed score has mean \(100\) and standard deviation \(15\). Calculate the \(z\)-score for \(x=130\), then state the standardized value.
Worked practice: standardising values
Calculate the z-score, then connect it to the standardised value requested.
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.