Statistics 257Applied Survey Techniques
Fall 2004 (200430)
Final Exam Solutions
Instructor: Michael Kozdron
1.
A simple random sample of size n from a population of size N is a probability sample in
which any sample of size n drawn from the population has
Math 257 Fall 2005
Quiz #1
Name:
You have 20 minutes to complete this quiz. Please answer all questions in the space provided.
1.
(3 points ) In Section 1.2, Barnett briey examines examples of sample surveys from 8
dierent subject areas. List 3 of those s
Statistics 257 Midterm October 21, 2005
This exam has 2 problems and 6 numbered pages.
You have 50 minutes to complete this exam. Please read all instructions carefully, and check
your answers. Show all work neatly and in order, and clearly indicate your
Stat 257 Fall 2005: Selected Solutions to Midterm
Remark: The following numerical solutions must be adjusted if the approximation z0.05 = 2 is
made.
2. (a) If we consider the estimator of Y based on the values of y alone, then we obtain
y=
1
n
n
yi =
i=1
Statistics 257Applied Survey Techniques
Fall 2005 (200530)
Final Exam Solutions
Instructor: Michael Kozdron
1.
(a) The Petersen estimator of N is given by
59 45
nm
=
= 295
N=
r
9
and has estimated variance
s2 (N ) =
nm(n r)(m r)
59 45 (59 9) (45 9)
=
655
Math 257 Fall 2005
(Selected) Solutions to Quiz #2
(a) Selected answers include the following.
It is possible that some residents of Wascana Lodge do not rely on public transportation, perhaps having access to a vehicle through a family member, and are th
Math 257 Fall 2005
Quiz #2
Name:
You have 20 minutes to complete this quiz. Please answer all questions in the space provided.
In an eort to help the Regina City Council gauge the publics opinion about the strike by
the Public Service Workers, you decided
Stat 257 Fall 2005
Quiz #5
Name:
You have 20 minutes to complete this quiz. Please answer all questions in the space provided.
1.
As Barnett notes in Section 6.1, there are a number of sources of error and variation
that a survey sample designer might nee
Stat 257 Fall 2005
Quiz #4
Name:
You have 20 minutes to complete this quiz. Please answer all questions in the space provided.
1.
In Section 4.7, Barnett discusses quota sampling.
(a) What is one of the merits or advantages of using quota sampling for a s
Math 257 Fall 2005
Quiz #3
Name:
You have 20 minutes to complete this quiz. Please answer all questions in the space provided.
A social worker from the Regina-Quappelle Health District is concerned about living conditions
in the downtown area. She decides
Math 257 Fall 2005
Solutions to Quiz #3
(a) Briey, ratio estimation might be appropriate because the social worker is interested in a
ratio of population characteristics, and she has complete knowledge about the total number of
dwellings. Furthermore, the