Q5 Andy scored 77 points What was his percentile rank a 866 b 85 c 933 d 843 e

Q5 andy scored 77 points what was his percentile rank

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Q5. Andy scored 77 points. What was his percentile rank? (a) 86.6% (b) 85% (c) 93.3% (d) 84.3% (e) none of (a) – (d) [2 marks] Q6.Which of the following EXCEL commands would give you the answer in Q5 ? (a) =normsinv(1.5) (b) =normsinv(.77) (c) =normdist(77,47,20,1) (d) =1-normdist(77,47,20,0) (e) None of (a) – (d) [2 marks] Q7.Which of the following EXCEL commands would give you the 48thpercentile? [2 marks] Q8. Anna’sscore was at the 48thpercentile. What was her score? [2 marks]
Q9. “The difference in points between the 48thpercentile and the58thpercentile (of the exam scores in Q5 – Q8) is the same as the difference in points between the 58thpercentile and the 68thpercentile”. Trueor Falseand briefly explain[3 marks] Q10.A quiz is given to a large group of students. Four scores are shown below, in original and t standard units. Original Units: 19 55 73 ___ Fill in the blanks. [5 marks]Standard Units: -2.5 ___ Q11.A drug company tests two treatments for a disease. The results are shown below.First TrialTreatment Number of SubjectsSuccess RateA30020%B300 15% Second TrialTreatmentNumber of SubjectsSuccess RateA15080%B60075% (a) What is the overall success rate of Treatment A? [1 mark](b) What is the overall success rate of Treatment B? [1 mark](c)Is there anything paradoxical about your answers in parts (a) and (b)? If so, explain(Don’t just name it, but explain it).Use the extra work sheet to explain why. [4 marks] . 2 0 .

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