Andrea Lewis
HDFS 361
May 14, 2012
Results
Eleventh grade students were asked survey questions regarding their perception of their weight.
The sample frame was 3,551 who answered questions in the Oregon Healthy Teens survey. The response rate for the firs

Discuss the major ethical issues in behavioral research including risks, benefits, deception, debriefing,
informed consent, and justice. How can researchers weigh the need to conduct research again the need
for ethical procedures?
In behavioral research t

Chi-Square
Probability level- .05
x^2=E(observed-expected)^2/expected)
Expected-(row total x column total)/sample size
Degrees of freedom
Df=(r-1)(c-1) r=row total, c=column
If chi square number is larger than critical value, means your findings were stat

Movie Theater
Very dark in the room with dim lights along the side of the walls as well as smaller lights
on the carpeted floor for seeing the steps. Its air-conditioned inside and probably
around 68 degrees (Of course I didnt bring a jacket and Im alread

Experimental methodExperimental control: Extraneous variables are kept constant.-you want to control for as much
as the variability or variance as possible.
Randomization: Extraneous variables are eliminated
Randomness generally means equality between gro

H 220
Study Design In-class Exercise
Name:_ _
Study 1
Background
The average risk of human immunodeficiency virus (HIV) infection after percutaneous exposure to HIVinfected blood is 0.3 percent, but the factors that influence this risk are not well unders

1.
A clinical trial is conducted comparing a new pain medication for arthritis. Participants
are randomly assigned to receive the new medication or a placebo. The outcome is pain relief
within 30 minutes. The data are shown below.
Pain Relief
44
21
New Me

Hypothesis Testing -ONE sample
1.
The following table displays descriptive statistics on the participants involved in the study
described in Problem 1.
Characteristic
Mean Age, years
% Males
Mean Educational Level, years
Mean Annual Income, $000s
Mean Bod

The following is a study guide to help focus your efforts on preparing for the final exam.
I tried to make it as all-inclusive as possible, but cannot guarantee that everything on
the test is represented here (though I tried my best to make sure it was!).

H 220 Introduction to Health Data Analysis
Spring 2013
Midterm Exam
C
Instructions:
1. Clearly print your name and student ID below, and your name on the top right corner of all the
pages
2. Show all your work legibly so that partial credit can be earned

Practice Final
Fall 2013
Fall 2013
Multiple-Choice Questions
Circle the correct answer (2 points each):
1.
From the Empirical Rule, we know that bell shape distributions have the following
characteristic:
a.
b.
c.
d.
They tend to be skewed and non represe

1.
Hyperlipidemia in children has been hypothesized to be related to high cholesterol in their
parents. The following data were collected on parents and children.
CHILD
Not Hyperlipidemic
Hyperlipidemic
Both Parents
Hyperlipidemic
13
45
One Parent
Hyperli

Normal Distribution Probabilities Examples
Z=
x
By Algebra
x=+ Z
1.
Total cholesterol in children aged 10-15 is assumed to follow a normal distribution with a mean of
191 and a standard deviation of 22.4.
a. What proportion of children 10-15 years of age

Central Limit Theorem Examples
1.
Total cholesterol in children aged 10-15 is assumed to follow a normal distribution with a mean of
191 and a standard deviation of 22.4.
a. If a sample of 20 children are selected, what is the probability that the mean ch

1.
2.
A recent study reported that the prevalence of hyperlipidemia (defined as total cholesterol
over 200) is 30% in children 2-6 years of age. If 12 children are analyzed,
a.
What is the probability that at least 3 are hyperlipidemic?
b.
What is the pro

Science News (Feb. 18, 1995, p. 108) reported on an observational study
of 115,818 female registered nurses. In 1976, when the study began, the
women were between 30 and 55 years old. They were asked what they
weighed at the time of the study and what the

Clicker Questions:
1. Whereas between-subjects designs examine (at least) two samples of participants, within-subjects designs examine
_ sample(s) of participants.
a. Multiple
b. 3.5
c. 2
d. 1
2. In a within-subjects design, how many different study condi