1301_1011sem1

1301_1011sem1 - THE UNIVERSITY OF HONG KONG DEPARTMENT OF...

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THE UNIVERSITY OF HONG KONG DEPARTMENT OF STATISTICS AND ACTUARIAL SCIENCE STAT1301 PROBABILITY AND STATISTICS I December 14,2010 Time: 2:30pm - 4:30pm. Only approved calculators as announced by the Examinations Secretary can be used in this examination. It is candidates' responsibility to ensure that their calculator operates satisfactorily, and candidates must record the name and type of the calculator used on the front page of the examination script. Answer ALL FOUR Questions. Marks are shown in square brackets. 1. An amplifier circuit must be designed to achieve a gain of 100. The "minimum" circuit, which will achieve this gain, is shown in figure (i) below. It consists of two small amplifiers; each small amplifier magnifies the volume of sound by a factor of 10. Two alternative circuits are shown in figures (ii) and (iii) that will achieve the desired gain. Each circuit can function as long as signals can pass from A to B. Suppose each individual small amplifier has a reliability (chance of
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This note was uploaded on 01/16/2012 for the course STAT 1301 taught by Professor Smslee during the Fall '08 term at HKU.

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1301_1011sem1 - THE UNIVERSITY OF HONG KONG DEPARTMENT OF...

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