Q84 · Practice questionTechnology-activeSimple familiar3 marks
QUESTION 84 (3 marks)
A population has proportion . For random samples of size , use a normal approximation to determine to four decimal places.
WORKED SOLUTION
3 marksPractice marking scheme
ANSWER
.
Worked solution
. Then , giving an upper-tail probability about .
Determines the standard deviation of .
Standardises .
Determines the upper-tail probability, approximately .
Practice question aligned to the current QCAA syllabus; review the worked solution and marking criteria.
View the QCAA syllabusHow many marks did you earn?
Compare your working with the guide above.