Home Work Assignment 2
for MSIS 385 section 02
Last modified on 2/12/99
8:43 AM
Due February 23 1999 in class
Make sure to put your name, student ID number and the date on
the handout
Note:
Question 1
Do question 9.4 on page 333 of your text
Question 2
Do question 9.7 on page 333 of your text
Question 3
Do question 9.10 on page 336 of your text
Question 4
Do question 9.13 on page 337of your text
Question 5
In a small office of 8 people the number of days each employee
missed work due to flue in the months of January and February of
1998 is summarized in the following table:
Susan
Jack
Jamile
Munir
Pamel
a
Yin
Isabella
Lei
1
5
3
1
5
7
7
5
Consider a sample of size 2 with replacement from this population
a) What are the mean and variance of this population?
b) What is the probability density function of the sample mean?
What is the mean of the sample mean? What is the variance of
sample mean?
c) What is the probability density function of the sample variance?
What is the mean of the sample variance? What is the variance of
sample variance? (Note: sample variance is obtained by dividing
by n-1 where n is the sample size.)
d) What is the density function of the sample standard deviation
(square root of variance)? What is the mean of the sample
standard deviation? What is the variance of the sample standard
deviation?
Question 6
Do Question 5, parts a) through d) but using samples of size 2
without replacement. In each case compare the results to Question 5
and comment on similarity or difference.
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