CHLH 421 Health Data Analysis Homework
Assignment 07
Due: 5:00pm Wed Mar 30 2016
Note:
This assignment is worth of 40 points
Please type rather than hand-write your answers
1 Task 1 Hypothesis testing
A random sample of 200 inpatients in a hospital has

CHLH 421 Health Data Analysis Homework
Assignment #2
Due: 5:00pm Wed Sep 14 2016
Note: This assignment is worth of 40 points
Please type rather than hand-write your answers
Food Stamp Program Participation
This data consists of 150 randomly selected perso

Task 1: Explore STATA
1. State whether you have successfully installed STATA in your computer: I have
successfully installed STATA onto my computer.
2. State whether you have spent at least 15 minutes in exploring the functionalities of
STATA: I have spen

Assignment#7
Task1ExpectedValues
(Sigmasign)3ontopi=1onbottomofxX1andP1
a. X1XP1+x2xp2+x3=p3
a. =1x.60(60%)+2+30%
b. +3X10%
c. 1.5visitsperyear
Task2PositivePredictiveValue
PPVSensitivityxPrevalence)/(sensitivityxprevalence)+(1Specifity)X(1Prevention)
(.9

Mikyle Tapley
Instructor Ruopeng An
Community Health 421
27 October 2015
Assignment 07
1 Task 1 Hypothesis Testing
A random sample of 200 inpatients in a hospital has a mean healthcare expenditure of $2200 and
standard deviation of $500. Use these values

Mikyle Tapley
Instructor Ruopeng An
Community Health 421
23 September 2015
1 Task 1 Statistical independence
Based on the data of the above contingency table, are gender and individual preference
for use of a hand statistically independent? Why or why not

Assignment 1
Task 1: Explore STATA
1. State whether you have successfully installed STATA in your computer.
a. I have successfully installed STATA.
2. State whether you have spent at least 15 minutes in exploring the functionalities
of STATA.
a. I have sp

Mikyle Tapley
Instructor Ruopeng An
Community Health 421
23 September 2015
1 Task 1 Statistical independence
Based on the data of the above contingency table, are gender and individual preference
for use of a hand statistically independent? Why or why not

Marvin Johnson
671178459
Mljhnsn4
Assignment 3
1 Task 1 Statistical independence
Based on the data of the above contingency table, are gender and individual preference
for use of a hand statistically independent? Why or why not? (Hint: Event A and event B

Task One
1. Yes
2. Yes
Task Two
Continuous- Steps per day
Discrete- Number of household residents
Dichotomous- Religion
Nominal- Favorite food
Ordinal- Year in school (Freshman, Sophomore, Junior, Senior)
Time-to-event-Time until assignment is due
T

Introduction to Health Data Analysis
Part II
Zinnia Zhang
zzhang26@illinois.edu
Spring, 2016
1
Data types
Pieces of information
Scales of Measurement
Quantitative
Continuous any value is conceivable
Discrete (or count) only whole numbers are
possible

CHLH 421 Health Data Analysis Homework
Assignment #3
Due: 5:00pm Wed Sep 21 2016
Task #1 - Statistical Independence
Fema
le
90
RightHanded
Left-Handed 10
Total
100
Male
Total
180
270
20
200
30
300
Based on the data of the above contingency table, are gend

Alexa Piske
CHLH 421 Health Data Analysis Homework
Assignment #5
Due: 5:00pm Wed Oct 5 2016
Note:
This assignment is worth of 40 points
Please type rather than hand-write your answers
Task #1: Binomial Distribution Function
A biased coin is tossed 6 tim

CHLH 421 Health Data Analysis Homework
Assignment #1
Due: 5:00pm Wed Sep 7 2016
This assignment is worth of 40 points
Please type rather than hand-write your answers
Task 1: Explore STATA
State whether you have successfully installed STATA on your compute

CHLH 421 Health Data Analysis Homework
Assignment #6
Due: 5:00pm Wed Oct 19 2016
Note:
This assignment is worth of 40 points
Please type rather than hand-write your answers
Task #1 68-95-99.7 Rule of Normal Distribution
According to the Behavioral Risk

Alexa Piske
CHLH 421 Health Data Analysis Homework
Assignment #4
Due: 5:00pm Wed Sep 28 2016
Note:
This assignment is worth of 40 points
Please type rather than hand-write your answers
Task #1: Diagnostic Testing
(1)What is the prevalence of breast canc

TASK 1
1. What is the prevalence of breast cancer in this sample?
10/1000 = .01
2. What is the sensitivity of the breast cancer test? (Hint: sensitivity = P(Test + | Breast
cancer +)
9/10 = .9
3. What is the specificity of the breast cancer test? (Hint: s

Homework Assignment 2
Food Stamp Program Participation
This data consists of 150 randomly selected persons from a survey with information on
over 2,000 elderly US citizens, where the response, indicates participation in the U.S.
Food Stamp Program.
Variab

Introduction to Health Data Analysis
Part III
Zinnia Zhang
zzhang26@illinois.edu
Spring, 2016
1
Outline
Last time
Data types
quantitative, categorical, time-to-event
Today
Types of variables
Confounding
Types of study design
2
Types of variables
D

Marvin Johnson
671178459
Mljhnsn4
Assignment 3
1 Task 1 Statistical independence
Based on the data of the above contingency table, are gender and individual preference
for use of a hand statistically independent? Why or why not? (Hint: Event A and event B

Mikyle Tapley
Instructor Ruopeng An
Community Health 421
30 September 2015
Homework Assignment 04
1 Task 1 Diagnostic testing
(1) What is the prevalence of breast cancer in this sample?
Prevalence= 10/1000 -> .01 = 1%
(2) What is the sensitivity of the br

Mikyle Tapley
Instructor Ruopeng An
Community Health 421
6 October 2015
Homework Assignment 05
1 Task 1 Binomial Distribution Function
A biased coin is tossed 6 times. The probability of coming up with tails on any toss is 80%. Let
X denote the number of

Assignment 11
(1) Describe the dataset named bw.dta using the describe command. How many variables are
in the dataset?
-There are 10 variables in the dataset
(2) Summarize variables using the sum varname, detail command (for example, sum bwght,
detail). W

CHLH 421, Spring 2016
Lab 10, Due 4/8/16
NAME:_ UIN:_
Lab 10
Remember that we have analyze the calcium.dta in previous lab. The data collects participants
coronary artery calcium scores (as measured by electron beam computed tomography scanning),
other se

CHLH 421, Spring 2016
Lab 6, Due 2/16/16
NAME:_ UIN:_
Lab 6 Binomial Distribution
When an event only has two possible outcomes, it is called a Bernoulli Trial. Examples are
tossing a coin (head or tails) or the gender of a human (male or female). Statisti

CHLH 421, Spring 2016
Lab 7, Due 3/4/16
NAME:_ UIN:_
Lab 7
Confidence Interval for the Sample Mean
No matter how well a study has been carried out or how carefully the data has been collected,
there will always be some uncertainty as to how accurate our c

Assignment 11
The relationship between birthweight and maternal smoking during pregnancy
1. There are 10 variables in the dataset.
obs:
1,199
vars:
10
22 Apr 2015 12:12
size:
28,776
-storage display value
variable name type format label variable label
-fa

1.
2.
I have successfully installed STATA onto my laptop. It actually did not
take as long as I thought it would.
I have navigated STATA for more than 15 minutes. The tutorials in
class have been very helpful.
Continuous- any timed activity like a race
Di

Task 1
1. Relative Risk= (50/100,000)/(10/100,000)=5
2. Odds Ratio= [(50/100,000)/(1-50/100,000)] / [(10/100,000)/(110/100,000)]=5.002
3. Decrease in gun violence is due to strict gun laws. Cities with strict gun laws
may have an older population.
Task 2