fin04 - ISMT111 Business Statistics Final Examination For...

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1 ISMT111 Business Statistics Final Examination For section L2 only 13 th December 2004 Directions 1) Answer ALL SIX questions. Marks are shown in square brackets. 2) There are 5 pages in this examination paper. Check to make sure you have a complete set and notify the invigilator immediately if part of it is missing. 3) Key formulas and Statistical tables are provided separately. 4) Calculator may be used in this examination. 5) You are given THREE HOURS to complete this examination. Do not begin until you are told to do so.
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2 Question 1: [12 Marks] An experiment is about to be designed to estimate the percentage P of Hong Kong residents who are not of Chinese ancestry. The estimator to be used is the sample proportion p (of HK residents who are not of Chinese ancestry). (a) What sample size will be needed so that we shall be 99% sure that the sample proportion p will be within 2% of P? (b) Records of the past decade suggest that while the exact value of the percentage P is unknown, it should nevertheless be below 10%. With this information, what is the sample size needed in (a)?
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3 Question 3: [14 Marks]
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This note was uploaded on 08/26/2010 for the course ISOM ISOM111 taught by Professor Anthonychan during the Spring '09 term at HKUST.

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fin04 - ISMT111 Business Statistics Final Examination For...

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