Q10 · 2023 · Technology-activeSimple familiar1 mark
QUESTION 10
A student is trying to determine which subject they performed best in compared to other students. Results
from recent tests in four subjects (A to D) are shown. Assume student results in each subject are normally
distributed.
In which subject did the student perform best compared to other students?
Class standard Student’s
Class mean
deviation result
(A)
62 22 77
(B)
55 25 74
(C)
61 15 70
(D)
73 20 82
full terms and conditions, which specify certain exceptions to the licence. |
WORKED SOLUTION
1 markAnswer B
ANSWER
B — 55 25 74
Worked solution
Compute the standardised score for each result; subject B has the largest -score; B.
Selects option B.
Worked explanation by QCE Vault; correct option verified against the QCAA answer key.
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