Chapter 1: Descriptive Statistics
Census: has to be a collection of every individual in the population (not realistic)
Parameter: numerical measurement describing characteristic of population (fixed) census
Statistic: parameter of smaller sample of popula
Statistical Concepts and Methods for the Social Sciences
STATS 221

Fall 2012
Name: Nick Achtmann
Student Number: 1167359
SOC/STAT/CSSS 221: Statistical Concepts and Methods for the Social Sciences
*Homework Assignment 6*
Please use this form to record your answers and include any work that you would like to show the
grader (you ca
Statistical Concepts and Methods for the Social Sciences
STATS 221

Fall 2012
Name: Nick Achtmann
Student Number: 1167359
SOC/STAT/CSSS 221: Statistical Concepts and Methods for the Social Sciences
*Homework Assignment 2*
Please use this form to record your answers and include any work that you would like to show the
grader (you ca
Statistical Concepts and Methods for the Social Sciences
STATS 221

Fall 2012
Name: Nick Achtmann
Student Number: 1167359
SOC/STAT/CSSS 221: Statistical Concepts and Methods for the Social Sciences
*Homework Assignment 3*
Please use this form to record your answers and include any work that you would like to show the
grader (you ca
Statistical Concepts and Methods for the Social Sciences
STATS 221

Fall 2012
Name: Nick Achtmann
Student Number: 1167359
SOC/STAT/CSSS 221: Statistical Concepts and Methods for the Social Sciences
*Homework Assignment 5*
Please use this form to record your answers and include any work that you would like to show the
grader (you ca
Statistical Concepts and Methods for the Social Sciences
STATS 221

Fall 2012
Name: _
Student Number: _
SOC/STAT/CSSS 221: Statistical Concepts and Methods for the Social Sciences
*Homework Assignment 1*
Please use this form to record your answers and include any work that you would like to show the
grader (you can paste in photos
Statistical Concepts and Methods for the Social Sciences
STATS 221

Fall 2012
Name: Nick Achtmann
Student Number:1167359
SOC/STAT/CSSS 221: Statistical Concepts and Methods for the Social Sciences
*Homework Assignment 4*
Please use this form to record your answers and include any work that you would like to show the
grader (you can
Distance & Global Strategy
CEMEX & HAIER
Professor Ruth V. Aguilera
Top 10 NonFinancial TNCs from Developing Economies
ranked by foreign assets (US$bn), 2004
Company
Country
Industry
Foreign
Assets
Total
Assets
1. Hutchison Whampoa
HK,
China
Diversified
Dear Miss Patricia Quintana,
As requested, I have analyzed the past sales data of Northern Napa Valley Winery Inc. and
predicted the sales for the next twelve months. We are seeing a seasonal pattern with peak in
December and steady sales over the rest of
To,
The Division Managers,
As requested, I have analyzed the past data of Harmon Foods and predicted the case shipments
for January 1988 and the outcome of the model has been explained in the attached technical
report. Our valuation tool uses statistics t
Statistical Concepts and Methods for the Social Sciences
STATS 221

Fall 2012
Vyvy Bui
101016
Stat 220
Homework 2
1. a) We should NOT choose an SRS of 4,000 from 7,000 students who want basketball tickets,
because it should be first come first served for the number of students who wants to purchase
basketball ticket.
b) We should
Statistical Concepts and Methods for the Social Sciences
STATS 221

Fall 2012
Vyvy Bui
11716
Stat 220
Homework 6
1a) The subject has a 35/50 (7/10) chance of being assigned to Treatment A, since the SRS of 35
is being taken out of the 50 subjects total, which is reduced down to 7/10.
1b) The second subject has a 1/2 change of bei
Statistical Concepts and Methods for the Social Sciences
STATS 221

Fall 2012
Vyvy Bui
10216
Ranjini Grove
Homework 1
1. (a) The fraction of admitted female applicants is 20/70.
(b) The two percent we should compare in order is 17/50 which is 34% for males and 8/20
which is 40% for females, so men admitted is not disproportionate
Statistical Concepts and Methods for the Social Sciences
STATS 221

Fall 2012
Vyvy Bui
112816
Stat 220
Homework 9
1a) There are 50,000 (households) tickets in the box. Each ticket will have a value that represents
the average number of TV sets owned by each household. The statistician is calculating an
average of 400 draws withou
Statistical Concepts and Methods for the Social Sciences
STATS 221

Fall 2012
Vyvy Bui
10216
Ranjini Grove
Homework 1
1. (a) The fraction of admitted female applicants is 20/70.
(b) The two percent we should compare in order is 17/50 which is 34% for males and 8/20
which is 40% for females, so men admitted is not disproportionate
Statistical Concepts and Methods for the Social Sciences
STATS 221

Fall 2012
Vyvy Bui
112116
Stat 220
Homework 8
1A) The box is 1 and 0. The total of the box is 50,000 (household) tickets. Each ticket will have
a value that represents a person age 16 or ever, totaling to 400 draws in the box.
1B) EV = 400 x 2.38 = 952 interviews
Statistical Concepts and Methods for the Social Sciences
STATS 221

Fall 2012
Vyvy Bui
102416
Stat 220
Homework 4
1a) Variable 1: the 8 possible colleges/universities in Washington state. The possible values are
schools like UW Seattle or Bothell, or Western or Eastern Washington.
1b) Variable 2: the 9 possible races of students
Statistical Concepts and Methods for the Social Sciences
STATS 221

Fall 2012
Vyvy Bui
111416
Stat 220
Homework 7
1a) 4 children: (b x h / 2). Base is 125 90 = 35. Height is 1/35 because area is always 1.
2 children: Base is 112 90 = 22. 22/2 = 11. The other part
4 children:
Its based on a triangle shape, so you have to take the
Statistical Concepts and Methods for the Social Sciences
STATS 221

Fall 2012
Vyvy Bui
101716
Stat 220
Homework 3
1a) The values are:
a1 = 10 pilots (total drug users)
a2 = 9 pilots (drug users who fail the test)
a3 = 990 pilots (clean pilots total)
a4 = 99 pilots (clean pilots who fail test)
I calculated these values by taking 1
jpeg("exp.jpg")
dat = rexp(1000,2)
hist(dat, freq=F)
x = seq(0,4,.01)
f = dexp(x,2)
lines(x,f, col=2)
dev.off()
Consider a population consisting of n objects. If we take a sample of size m
from this population (without replacement), then there are nCm (re