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September 21, 2015
quiz 1
Name _
P( X = k ) = (1 )()
binomial formula for reference
Part 1. (11 points) A random sample of 8 individuals is selected from a population of women
undergraduate students in a large state university system. Previous rese

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check your understanding additional probability problems, part 1
apply your knowledge
9.1 hemophilia. Hemophilia refers to a group of rare hereditary disorders of blood
coagulation. Because the disorder is caused by defective genes on the X chromos

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check your understanding additional probability problems, part 2
adapted from Moore, McCabe, and Craig
Mendelian inheritance. Some traits of plants and animals depend on inheritance of a single
gene. This is called Mendelian inheritance, after Greg

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preparing for quiz 2
The quiz is half of section on Thursday, October 1.
summarizing observations graphically
know how to construct:
box plot (with or without outliers)
histogram using percents as areas
in the box plot, know how the fences are cons

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outline, part 1
Wednesday August 26
introduction
samples and observational studies
To the Student: Stat Thinking
chapter 7: 155172
Friday August 28
designing experiments
chapter 8: 177201
Monday August 31
measurement scales
summarizing and graphing

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September 21, 2015
quiz 1
Name _
P( X = k ) = (1 )()
binomial formula for reference
Part 1. (11 points) A random sample of 8 individuals is selected from a population of women
undergraduate students in a large state university system. Previous rese

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section activity for Thursday, Sept 10
Name _
Baldi and Moore problems from second edition
10.20 to 10.23
The November 2009 Gallup-Healthways Well-Being Index survey asked a random sample of
28,606 American adults whether they had the flu on the da

finding areas and z values for normal curve problems
the SurfStat online tables
easier to use than Table B in Baldi and Moore, as have more options for areas
Baldi and Moore Table B
For example, to find P( z < 1.25)
Look at the row of the table labeled 1.

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section activities Thursday, Sept 17
1. How many car license plates can a state have if each plate consists of 2 letters followed by 4 digits?
Repeat letters and digits are allowed. (Use the alphabet with 26 letters. There are 10 possible digits.)

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section activities for Monday, Sept 14 and Tuesday, Sept 15
Baldi and Moore problems 10.14 and 10.16
pages 250-251 and 254
10.14 testing for HIV. Enzyme immunoassay tests are used to screen blood specimens for the
presence of antibodies to HIV, the

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section activities Thursday, Sept 24
random variables
winnings at heads and tails
Jos and Juanita are playing a coin-tossing game.
Imagine they are on a very long trans-Pacific flight, so they play a lot of repetitions of this game.
One of them tos

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section activities for Monday, Sept 21 and Tuesday, Sept 22
adapting from Baldi and Moore problem 10.32
page 259
polydactyly
P(polydactyly each singleton infant) = 1 / 500 = .002
n = 100
Use Stata and the SurfStat online binomial calculator
to find

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section activities for Monday, Sept 28 and Tuesday, Sept 29
1. using z scores
SAT and ACT college admissions test scores have distributions that are symmetric and moundshaped, but they are on much different scales.
SAT
mean 1026
std dev 209
ACT
mea

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section worksheet Monday, Sept 14 and Tuesday, Sept 15
Name _
SID _
According to the CDCs Behavioral Risk Factor Surveillance System (BRFSS) about 60% of
American adults live a sedentary lifestyle.
You randomly select 10 adults from this population

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section worksheet Monday, Sept 21 and Tuesday, Sept 22
Name _
SID
_
turn in at lecture on Wednesday, Sept 23 (see note below)
Baldi and Moore problem 12.45
page 310
planning for hospital admissions
A private hospital gets an average of 3.2 hospital

probability
an overview
probability
our language for rates and sub-group rates
unemployment rates
unemployment rates for various levels of education
labor force participation example
M_McC_C problems 4.124 to 4.127 from earlier editions
handout
P ( empl

drawing a histogram
especially important for tables with unequal width intervals
from Statistics, Freedman, Pisani, Purves, W. W. Norton & Co.
The object of this section how to draw a histogram. The method is not difficult but there are a
couple of wrong

summary of probability rules
basic terms to know:
outcome
event = a set of outcomes
sample space = the set of all possible outcomes
for k equally likely outcomes,
assign probability 1/k to each
for an event A consisting of m of these outcomes, assign prob

pedometer steps and BMI in college women
Moore, McCabe and Craig chapter 10 example
As part of a study of physical activity, fitness, and weight among college students, Michael
Mestek and colleagues studied 100 women undergraduates who wore pedometers dai

restricted vs. full F tests
In many situations, we want to compare the fit of two linear models
E(Y) = 0 + 1 X1 +2 X2 + 3 X3 + . + q Xq + q+1 Xq+1 + . + p Xp
E(Y) = 0 + 1 X1 +2 X2 + 3 X3 + . + q Xq
where the X variables in the restricted model are a subse

regression with log Y as outcome
why?
The linear regression model we have been using assumes additive change
that is, the when we compare the means of 2 populations whose X values differ by one unit,
we add the slope to the mean E( Y | X ) to get E( Y |

county demographic information
440 of the most populous counties in the US
(counties for which all of the desired variables were not available were not included)
from KNNL (Kutner, Nachsheim, Neter, and Li)
Applied Linear Statistical Models, 5th ed
The da

outline of solutions for problems from chapter 4 of Moore, McCabe, and Craig, 8th ed
depending on the context of the problem, Venn diagrams and trees are really useful
but they're not included here because they're hard to make on computer!
4.111
exercise

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regression case study 1
Mogri et al. carried out a cross sectional study to investigate the association between obesity
and hormone levels in pubertal adolescent males. Based on previous endocrinology research,
they hypothesized that the young men

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summer 2015
important dates
Wednesday, July 8
quiz 1
Friday, July 10
quiz 2
Tuesday, July 14
quiz 3
Friday, July 17
exam 1
Friday, July 24
quiz 4
Tuesday, July 28
quiz 5
Friday, July 31
exam 2
Wednesday, August 5
case study 1 due (regression with o

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probability and statistics in biology and public health
summer 2015
brief course description:
probability
descriptive statistics
sampling distributions
confidence intervals and tests for means and proportions
comparing the means of 2 populations
co

Moore and McCabe's table with education, labor force participation, and employment
for the civilian population aged 25 years and older
from the 2003 Current Population Survey (CPS)
pages 292 (7th edition)
problems 4.124 to 4.127
entries are in thousands o

distribution of a hypergeometric random variable
population size N = 13
9 men, 4 women
what is the probability distribution of the number of men in a random sample of size 3 ?
. set obs 4
obs was 0, now 4
. gen index = _n
. gen count_men = index - 1
. lis

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preparation for midterm
You may bring one 8 by 11 sheet with formulas, the probability summary,
and the counting rules summary.
You will need a calculator. Cell phone calculators may not be used during the exam.
This handout is not exhaustive, but