The Hong Kong University of Science and Technology
ISMT 111 - Business statistics, Fall 2004
Lecture Section 2 (Dr So)
Problem Sheet 3
Suggested Solutions
1.
Will be posted later
2. (a) 0.1056
(b) 13.42
(c) 0.9561
3.
Will be posted later
4. 0.9463
5. (a) 0.0668
(b) 11.29 days (c) 0.9749
6.
Will be posted later
7. (a) 0.1922
(b) 0.096
8. (a) Let
x
be the number obtained. The probability distribution of
x
is as follows:
X
-2
0
2
Sum
P(
x
)
3/6
1/6
2/6
x
P(
x
)
-1
0
4/6
-1/3
x
P(
x
)
12/6
0
8/6
10/3
(b) E(x) = –1/3, SD = 1.795
(c) 0.8454
9. (a) Expected value = 1.66, SD = 7.5422
(b) 0.0885
(c) 1.752
10. (a) 0.6247
(b) 0.8621
11. (a) 0.2514
(b) 1246.75

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