Biostats:
Chapter 13:
Equation Review:
H0:1=2=k vs. Ha: at least two s differ.
k: number of groups
ni: sample size in group i, i = 1, 2,k
N=ni
: sample mean of all observations
x
: sample mean in group i, i = 1, 2,k
xi
: sample standard deviation in group
Stats:
A.
Hypotheses.
H0: no association in population versus
Ha: association in population
B.
Test statistic.
Pvalue. Convert the X2stat to a Pvalue with a a Table E or software program.
C.
Example:
Data below reveal a negative association between smok
Biostats Chapter 14:
Tuesday
MAY 10TH 1 PM FINAL
Correlation and Regression:
Scatter Plot:
Look for trends
Inspect:
Form: Can the relation be described with a straight or some other type of line?
Direction: Do points tend trend upward or downward?
Stre
3/16: Biostats
Review:
Single Sample:
Random sample of size n that produced x1, x2, x3, xn
Calculate a 95% confidence interval for
s
X bar +/ t0.975, n1 (
)
n
Make null and alternative hypothesis
x o
s
t=
n
Larger absolute value of t score, small
3/2:
Exam II: Tuesday March 7th, provided with tables and formulas, bring calculator
Chapters: 69
Practice Problems: Sets 4,5,6,7
Binomial Distribution
Normal Distribution
Sampling Distribution (x bar and p hat)
Intro to Hypothesis Testing
 in par
3/9:
Chapter 10: Basics of Confidence Intervals
2 basics types:
o Hypothesis testing
o Estimation
Point estimate
A single best estimate of a parameter (xbar is point estimate of )
Interval estimate
Surrounding the point estimate with a margin of erro
3/14:
Test Review:
Question 1:
High exposure: p=0.41, n=15, P(X>2)=P(X3) or 1P(X2)
1(15Co (0.41)0(0.59)15 + 15C1 (0.41)1(0.59)14 + 15C2 (0.41)2(0.59)13)=0.9773
Between P(2<X<6)= P(3X6)
=P(X=3)+P(X=4)+P(X=5)
Question 7:
Lots of people got one sided p val
Stats:
Test 3:
Mean: 85.74
Median: 88
1) 2sided Ho: d=0
Ha:d0
2) Ho: less than or equal to 7
Ha: Ho: >7
3) one sided test
Ho: p less than or equal to 0.25
Ha: p greater than 0.25
4) assume unequal variances, df=19.2 (round to 19 or 20)
CI: 10.90+/ 10.5
4/18:
Chapter 13: One Way Analysis of Variance (ANOVA)
Ho: 1= 2= 3.= k
Example: study in which heart rates (bpm) of participants were monitored after being exposed
to a psychological stressor. Participants were randomized to one of 3 groups:
Group One: m
2/21:
Parameters
Statistics
Source
Population
Sample
Calculated?
No
Yes
Constant?
Yes
No
Notation (examples)
, , p
Page 539 Appendix A, random number generator
N=50, n5 50C5 = 2,118,760 possible samples
Parameter , statistic X bar
Frame= population list
Chapter 9 Hypothesis Testing:
Residual Problem from Last Class:
o Page 194
o Ex 8.14 page 194
N=500, p=0.25, q=0.75
Determine probability that sample contains 100 or fewer (P X 100
n=500, p=0.25)
= E(X)= np= 500(0.25) = 125, so getting 100 is less t
Biostats 4/27/17:
Y: dependent
X: independent
Always put independent on x axis (horizontal),
dependent variable on vertical axis (vertical)
Close scatter is to line, stronger correlation
Horizontal line, no correlation
Find summary statistics and convert
SPHU 2150 Exam 1 Study Guide
Environmental Health:
Define environmental health.
Environment: Refers to the complex of physical, chemical, and biotic factors (as climate,
soil, and living things) that act upon an organism or an ecological community and ult
Public Health Test 2:
heavier on comparative health systems
Beveridge and Bismarck model
may see question on UK (Beveridge)
Taiwan (take look back, pbs front lines sick around the world, NHI, have card that carries info)
T/F, MC, 56 short answer
iss
Chapter 7: Normal Probability Distributions:
o Normal random variables are the most common type of continuous random
variables
Symmetrical
Describes many natural phenomena
Describes the behavior of means
o Continuous random variables are described wit
Chapter 7 Continued 2/16:
Example:
o X= sodium intake
o = 2490 mg
o = 745 mg
o x ~ normal
o What is P(2721<X<4204)?
x
X=
27212490
42042490
(
)<z<(
) = P (0.31<z<2.30)
745
745
use table on page 541 table B in appendix to find P(z<b) and
P(Z<a)
P(z<2.
1. Based on your project, and the results, recommend an intervention that you believe would
target the issue or a part of the issues uncovered in your investigation. Describe the intervention
and justify your reasons for recommending it. Use McKenzie text
Mariana Del Valle
SPHU 311001
Midterm quiz
1.You were assigned reading about the models for program planning in McKenzie's book in
Chapter 3. Without using the P/Proceed model, which one of the models would you want to use
if you were asked to do a needs
SPHU 3300 Sustainable Nutrition First Quiz Study Guide
This quiz will be 50 points and will be on Wednesday, February 22nd in the
normal classroom.
Mariana Del Valle
Chapter 1
Be able to identify which leading causes of death are associated to nutrition
o
!
Chapter 1
Be able to identify which leading causes of death are associated to nutrition
#1 heart disease
#2 cancers
#3 strokes
#4 strokes
#7 diabetes mellitus
Know the six classes of elements which are organic

water
carbohydrate (organic)
fat (organi
Chapter 6: Proteins and amino acids
The structure of amino acids
Amino acids are the building blocks of proteins
All have same simple chemical backbone consisting of 1 carbon atom with an amine group
(nitrogencontaining part) and acid group attached
Each
As more research is done considering the adverse health effects of air pollution one new
trending topic today has been Mental Health, and when we look at it a little more. We see the
connection that air pollution can have. There are psychological and toxi
Domoic Acid is a naturally occurring deadly toxin produced by certain
types of algae most notably in red algae. This acid can be harmful and lethal to
humans if contaminated shellfish is consumed.
Although this toxin has been around forever only
recently
There are many different opinions on the dangers of hydraulic fracking. Fracking is the
implementation of oil and gas drilling that involves pumping water, sand and chemicals
underground to create cracks in tight shale formations so that it releases the n
There are so many effects of light pollution but specifically when speaking of light at
night, there is one huge aspect that should be discussed. The effects that LAN has on the
circadian cycle. The circadian cycle is the clock in your body, the 12hour d
toxicology=study of the adverse effects of chemical, physical, or biological agents on people,
animals, and the environment
Paracelcus: dose makes the poison
Pott described the occupational scrotal cancer in chimney sweeps
modern toxicology begins at
Marie Thomas
Personal Care Product
The following information is based on the active and inactive ingredients in the face wash I used
called Biospore Charcoal Acne Clearing Cleanser. The most interesting distinction I learned
through this assignment in the
Before writing this risk assessment I realized perfluorinated chemicals was a substance I did not
know much about. Of course, I knew that they were chemicals used within things but I looked up
the National Institute of Environmental Sciences and National
Since the production of crumb rubber fields, Public and Safety organizations have raised
concerns about the hazards of the recycled rubber, chemicals, and metals that go into the
production of synthetic turf fields and playgrounds. Many people are concern