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Unformatted text preview: More PastPaper: http://ihome.ust.hk/~cs_gxx ISMT111 Business Statistics
Midterm Examination
For sections 16 only
14th October 2005
Directions
1) Answer ALL FIVE questions. Marks are shown in square brackets.
2) There are 4 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. ht
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x/ 5) You are given TWO HOURS to complete this examination. Do not
begin until you are told to do so. More PastPaper: http://ihome.ust.hk/~cs_gxx Question 1:
[22 Marks]
Suppose that there are 100 boxes each containing 5 red balls and 3 black balls. 100
students are assigned to one box each and are asked to pick 4 balls without
replacement from his or her box.
(a) For one box what is the probability that a red ball is chosen on the 2nd and 3rd
pick?
(b) Suppose that Y100 denotes the number of students, out of 100, that will obtain a
red ball on the 2nd and 3rd pick. Fnd the me...
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This note was uploaded on 02/27/2010 for the course ISOM ISOM111 taught by Professor Anthonychan during the Spring '09 term at HKUST.
 Spring '09
 AnthonyChan

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