Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2006
Lecture 7 Notes: Joint Density
If X and Y are continuous random variables defined over the same sample space S. The joint
p.d.f. of (X, Y ), fXY (x, y) is a function such that for any subset A of the (x, y) plane,
P (X, Y ) A) = fXY (x, y)dxdy
A
As in the
Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2016
YOUTH BIBLE STUDY 3/23/2016
Leviticus
Ive Been Built for This
WHATS GOING ON IN LEVITICUS?
God is constantly speaking to Moses on behalf of The Israelites
Follows on from the events of exodus
Leviticus can be considered the USER MANUEL for the tabernacle
Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2016
Jermell Witherspoon
Dr. Platt Psychology 374
January 16, 2016
The Behaving Brain
The video The Behaving Brain was very informative when it came to really
understanding how the human brain works and how our bodies must be in constant flow with
our brain,
Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2016
MY BIG BABY
Ways to prevent
Childhood
Obesity
1. Encourage
healthy eating
habits. Small
changes can lead to
a recipe for
success!
2. Remove calorierich temptations
Childhood Obesity
Common misconceptions
Sugar substitute is better than real sugar for
3. H
Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2016
Jermell Witherspoon
Drug Summary
Methadone is a drug in the opiate category it decreases sensitivity to pain and increases
relaxation. Methadone has pain relieving chemicals in it called endorphins. When dealing with
methadone the opioid receptors that ar
Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2016
When walking through my yard the first step in the perceptual process that leads
me to recognizing a particular interesting thing in my yard is the environmental
stimulus, which is the yard itself and all the things that make it up.as I walk through I
see
Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2016
Jermell Witherspoon
PSY 355.01 Sensation and perception
05/27/2015
The world is a crazy placed made up of so many different components. It has always been
amazing to me how unique we are as people. Im learning that our uniqueness goes beyond our
physical
Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2016
Atlantic Street Family Resource Center
Police Engagement Workshop
NAME:
FIRST Name and LAST Name
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Atlantic Street Family Resource Center
Police Engagement
Workshop
Email
Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2016
Jermell Witherspoon
Reaction to Documentary, Unnatural Causes: Is Inequality Making Us Sick?".
When addressing the issue of sickness amongst ethnic minorities in America, I have
gathered from the videos and text what I see as a compact conclusion as to wh
Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2016
CORRELATION
Tina Vazin, Ph.D.
Correlation Coefficient
Statistic showing the degree of relation between
two variables
Simple Correlation coefficient (r)
It is also called Pearson's correlation
Product Moment correlation
coefficient.
Symbolized by r
It meas
Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2006
Lecture 1 Notes: Introduction to Course
1
Introduction and Overview
This class will give you an introduction to Probability Theory and the main tools of Statistics.
Probability is a mathematical formalism to describe and analyze situations in which we do
Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2006
Lecture 8 Notes: Underlying Variables
Lets recap what we have already learned about joint distributions of 2 or more random
variables, say
X1, X2, . . . , Xn
if X1, . . . , Xn are discrete, their joint p.d.f. is given by
fX1,.,Xn (x1, . . . , xn) = P (X1
Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2006
Lecture 10 Notes: Covariance
The covariance of X and Y is a measure of the strength of the relationship between the two
random variables.
Definition 1 For two random variables X and Y , the covariance is defined as
Cov(X, Y ) = E [(X E[X ])(Y E[Y ])]
Firs
Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2006
Lecture 9 Notes: Order Statistics
Let X1, . . . , Xn be independent random variables with identical p.d.f.s fX1 (x) = . . . = fXn (x) well generally call such a sequence independent and identically distributed, which is
typically abbreviated as iid. We ar
Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2006
Lecture 5 Notes: Discrete Random Variables
Definition 1 A random variable X has adiscretedistribution if X can take on only a finite
(or countablyinfinite) number of values (x1, x2, . . .).
Definition 2 If random variable X has adiscretedistribution, thep
Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2006
Lecture 3 Notes: Counting Rules and Probabilities
Recall that with simple probabilities, each outcome is equally likely, and for a finite sample
space, we can
give the probability of an event A as
n(A)
P (A)
n(S
=
)
Well now see how to make good use of co
Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2006
Lecture 4 Notes: Bayes Theorem
In the last lecture, we introduced conditional probabilities, and we saw the Law of Total
Probability as a way of relating the unconditional probability P (A) of an event A to the
conditional probabilities P (ABi). Another
Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2006
Lecture 2 Notes: Probability of Events
So far, we have only looked at definitions and properties of events  some of them very
unlikely to happen (e.g. Schwarzenegger being elected 44th president), others relatively
certain  but we havent said anything
Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2006
Lecture 6 Notes: Random Distributions
Suppose that a random variable is such that on some interval [a, b] on the real
axis, the
probability of X belonging to some subinterval [a, b] (where a a b b) is
proportional to the length of that subinterval.
distr
Introduction to Economical Statistics and Mathematics
ECON 1045

Spring 2016
HOME VISIT RECORD
Childs Name Zerahiah Thomas _ Home Visitors Name _Jermell
Witherspoon _
Date of Visit _11/04/2015_ Length of Visit _30_ Visit
# _4_
Participating Adult _Mother_ Others Present _
Notes/concerns: Have there been any significant changes sin