Assignment 1 PHC 210
Compose a Word document that answers the following questions:
Why choose biostatistics over statistics for biomedical research?
Health scientists observe the relationship between alcohol consumption and liver cancer,
what is the objec
:Matched Pair Data
McNemars Test and Estimation of the Odds Ratio
The 2 2 table of Example 6.19 does not satisfy the assumptions of
previous sections. The proportions using oral contraceptives among
cases and controls cannot be considered samples from two
The PAPM suggests further that it is important to distinguish between
the people who have never
thought about an action and those who have given the action some
.consideration but are undecided
There are several reasons for making this distinction. First,
Design
The design phase decides how the system will operate, in terms of the
hardware, software, and network infrastructure; the user interface,
forms and reports; and the specific programs, databases, and files that
will be needed. Although most of the s
Square Root Transformation
It is often considered a disadvantage to have a distribution with a
variance not stable but dependent on the mean in some way, as, for
example, the Poisson distribution. The question is whether there is a
transformation, g(Y ),
Biostatistics Main Points
Definitions
All tests
Statistics
Chapter 2
Types of studies
o Observational
o Experimental
o Laboratory
o Comparative
o Crossover
o Clinical
o Prospective
o Retrospective
o Case-control
o Matched case control
o Frequency matched
PHC-210
Midterm Study Guide
PHC-210 Midterm Study Guide
Review all Homework questions.
PHC-210 Midterm Study Guide
1) Define descriptive statistics, inferential statistics, and
2) What is the objective of statistics?
3) How is the median different from th
Biostatistics and Epidemology
Assignment week 4
The population of a clinical study of Americans with diabetes is
considered to be the collection of blood sugar levels of ALL Americans.
The average blood sugar level for the population is called the (_) of
Biostatistics and Epidemology
Assignment 1
1- Why choose biostatistics over statistics for biomedical research?
2- Health scientists observe the relationship between alcohol consumption and
liver cancer, what is the objective of the study?
3- The study in
Biostatistics and Epidemology
Assignment week 10
. Using the following equation and table, compose a Word document
that answers the following questions:
Equation 1
y = 0 + iXi + I
Table 1
X
1.00
Y
1.00
2.00
2.00
3.00
1.50
4.00
3.65
5.00
2.25
A- How would
Chapter 15
Rates and Proportions
Rates and Proportions
Rates, Incidence, and Prevalence
Rate refers to the amount of change occurring in a
quantity with respect to time.
Rate refers to the amount of change in a variable over
a specified time interval di
PHC 210
4-1 review questions
The population of a clinical study of Americans with
diabetes is considered to be the collection of blood sugar
levels of ALL Americans. The average blood sugar level for
the population is called the (parameter) of the study.
PHC 210, 9-1 review questions
1-
How would you define the Wilcoxon Signed Rank Test?
The Wilcoxon Signed Rank Test is a test that uses information from paired replicates in order to test
a null hypothesis.
2-
How would you define the Mann-Whitney Statisti
PHC 210 week 3
Hair color, gender and birthplace are all examples of (qualitative) variables.
A Geiger counter measures the number of particles emitted by a radioactive
element in counts per minute. Radioactive emissions are an example of
(quantitative) v
6-1 review questions
1
Compose a Word document that answers the following questions:
One of the goals of the Obama administration is to ensure all
Americans have health insurance. A survey to determine how many
Americans have health insurance is an examp
7-1 review questions
1
Compose a Word document that answers the following questions:
What is the Chi-Square Test?
Chi-Square Test is a statistical test of a specific hypothesis in
which observed data is compared to expected one.
The Chi-Square Test examin
Chi-Square Tests for Unknown Cell Probabilities
Above, we considered tests of the goodness of fit of multinomial data
when the probability of being in an individual cell was specified
precisely: for example, by a genetic model of traits are inherited. In
Continuity Correction for 2 2 Table Chi-Square Values
There has been controversy about the appropriateness of the continuity
correction for 2 2
tables [Conover, 1974]. The continuity correction makes the actual
significance levels under the
null hypothesi
An experiment: is a study in which an investigator
deliberately sets one or
more factors to a specific level.
Experiments lead to stronger scientific inferences than do
observational studies. The cleanest experiments exist in the physical sciences;
nevert
Relationship
between
Contraceptives and
Thromboembolic Disease
the
Use
of
Oral
In 1967 in Great Britain, there was concern about higher
rates of thromboembolic disease (disease
from blood clots) among women using oral contraceptives
than among women not u
Some Definitions of Statistics
The science of statistics is essentially a branch of
Applied Mathematics, and may be
regarded as mathematics applied to observational data. . .
. Statistics may be regarded
(i) as the study of populations, (ii) as the study
WHY BIOSTATISTICS?
Biostatistics is the study of statistics as applied to biological areas.
Biological laboratory experiments, medical research (including clinical research), and health
services research all use
statistical methods. Many other biological
Use of Laboratory Tests and the Relation to Quality
of Care
An important feature of medical care are laboratory tests.
These tests affect both the quality and
the cost of care. The frequency with which such tests are
ordered varies with the physician. It
WHAT IS THE FIELD OF STATISTICS?
Much of the joy and grief in life arises in situations that involve
considerable uncertainty. Here
are a few such situations:
1. Parents of a child with a genetic defect consider whether or not
they should have another
chi
An observational study:
collects data from an existing situation. The data
collection does not intentionally interfere with the running
of the system.
There are subtleties associated with observational studies.
The act of observation may introduce change
The greatest danger is in statistical analysis untouched by
the human mind. We have the
following objectives:
1. You should understand specified statistical concepts
and procedures.
2. You should be able to identify procedures appropriate
(and inappropria
A laboratory experiment: is an experiment that takes
place in an environment
(called a laboratory) where experimental manipulation is
facilitated.
Although this definition is loose, the connotation of the
term laboratory experiment is that
the experiment
Yasser alnofaiei (120008776)
PHC210 week 12
1.
Define epidemiology.
Focuses on the distribution and determinants of disease
frequency in human populations.
2.
Differentiate between clinical and subclinical disease.
Clinical means that the individual is sh
What statistical analysis should I use?
Statistical analyses using SAS
Introduction
This page shows how to perform a number of statistical tests using SAS. Each section gives a brief
description of the aim of the statistical test, when it is used, an exam
5-1 review questions
1) Define null hypothesis.
An observation that is based a theory that is not verified
2) Theoretical statistics often model pivotal variables. Define a pivotal
variable/
a pivotal variable is the function of statistics and parameters
Waterfall
Development The original structured design methodology (still used
today)is waterfall development. With waterfall developmentbased
methodologies, the analysts and users proceed in sequence from one
phase to the next (see Figure 1-2). The key del
Matched pair study
One of the difficult aspects in the design and execution of matched pair
studies is to decide
on the matching variables, and then to find matches to the degree
desired. In practice, many
decisions are made for logistic and monetary reas
POISSON RANDOM VARIABLES
The Poisson distribution occurs primarily in two closely related
situations. The first is a situation in which one counts discrete events in
space or time, or some other continuous situation. For example, one
might note the time o