spotlight
random sampling
vs. assignment
random
sampling
sample
population
generalizability
random
assignment
treatment
sample
control
causality
example
population
sample
Serif
Sans Serif
confounding
variable
serif
(1) random
(2) random
sampling
ass

AP REVIEW-REGRESSION
Linear Regression (#1)
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
B
C
B
C
C
E
C
E
A
B
A
Linear Regression (#2)
1.
2.
3.
4.
5.
6.
7.
8.
B
B
E
C
B
B
B
B
Linear Regression (#3)
1.
2.
3.
4.
5.
6.
7.
8.
9.
10.
11.
12.
13.
14.
B
B
B
B
D
D
B
E
B
D
C

Name _
2002 AP Statistics Multiple Choice Exam
Directions: Solve each of the following problems, using the available space for scratchwork. Decide
which is the best of the choices given and fill in the corresponding oval on the answer sheet. No credit
wil

Name: _
AP Statistics
compared to determine if one group tends to make more mistakes than the
other. What type of study is this?
a) census
c) voluntary response
e) matched-pairs
b) experiment
d) observational
AP Review Mixed
1) An SRS of size n is taken f

Name: _
AP Statistics
5) Consider the following two normal curves:
AP Review Continuous Distributions
1) If 75% of all families spend more than $75 weekly for food, while
15% spend more than $150, what is the mean weekly expenditure
and what is the standa

Name: _
AP Statistics
AP Review Inference with Means
1) If a 95%confidence interval for is (6, 9), what conclusion can
we draw if we test H0: = 10 vs. Ha: 10 at = 0.05?
a) reject H0
d) accept Ha
b) fail to reject H0
e) There is insufficient
c) accept H0
i

Name_
AP STATISTICS
1
A
C
2
A
C
3
A
C
4
A
C
5
A
C
6
EXAM REVIEW DAY 6
I have been collecting pennies most of my life. I place these spare pennies into a large
jar where they have accumulated over the last year. If we were to "raid" my penny jar
and record

AP Review One Sample Inference
1. B
2. C
3. A
4. C
5. B
6. D
7. D
8. D
9. D
10. B
11. B
12. E
13. B
14. C
15. C
AP Review Mixed
1. D
2. A
3. C
4. E
5. D
6. D
7. A
8. B
9. C
10.
11.
12.
13.
14.
15.
16.
D
B
D
B
D
C
B

Continuous Distributions Review
1) .8860 or .8854
2) $104.56, $43.86
3) .375
4) 63.29
5a) .25
b) .375
c) .75
6) 86.68F
7a) .45
b) .5
AP Review - Continuous Distributions
1)
2)
3)
4)
5)
6)
7)
8)
D
B
E
E
C
B
E
A
9) D
10) B
11) A
12) D
13) E
14) E
15) A

Arbreya Danielle Lewis
Statistics 101 Problem Set #1
January 27, 2017
Problems: 1.2, 1.6, 1.12, 1.20, 1.32, 1.44, 1.52, 1.56, 1.60, 1.64, 1.66, 1.68, 1.70
1.2.
a. 66/85 = (0.766)100
=77.6% of treatment group patients experienced significant improvements i

Psychology of the Diseased Brain
Circuits Order Disorder
Meta-analyses: statistical information to combine to form an opinion.
Circuits are represented by interconnected things. The create order or disorder.
It is important to recognize threat and danger,

Arbreya Danielle Lewis
Statistics 101 Problem Set #2
February 8, 2017
Problems: Chp 2: 2.2, 2.8, 2.18, 2.20, 2.22, 2.26 Chp 3: 3.4, 3.6, 3.12, 3.18, 3.26, 3.30, 3.36
2.2
a. P(red| previous 3 spins were red) = P(red) because each spin is independent.
There

Week 13 Assignment: Introduction to U.S. Culture Industries
Arbreya Danielle Lewis
April 6, 2016
Questions for speakers:
Tonia Beglari
Theres an article that explains your connection to artist Moreshin Allahyari. Could you elaborate
on the connection betw

The Fattening of America pg. 8 National Obesity Rates by Poverty Status (ages 20 74) graph Though
obesitys reach stretches broadly across the socioeconomic spectrum, it hits low-income Americans the
hardest.
Mechanization has lowered the cost of productio

Arbreya Lewis
Lauren Perry-Carrera
Jordan Hatfield
Math 105L Lab: Strategies for Buying Stocks
In this lab we analyzed and compared the buying strategies of four different stock
brokerage firms. We were given the history of the price of a stock over a two

Arbreya Lewis
Erin Mathias
Lauren Perry-Carrera
Due: October 27, 2014
Implicit Differentiation Lab
1. A curve described by the polar equation r2 = 4b (a - b sin2), where a and b are
positive constants. For appropriate values of a and b, the curve looks li

Name: _
AP Statistics
AP Review - Discrete Distributions
1) Assume that the probability that a baseball player will get a hit
in any one at-bat is .250. Which expression will yield the
probability that his first hit will next occur on his 5th at-bat?
a)
5

AP STATISTICS
FINAL EXAM REVIEW
ANSWERS
1 (D) Solving for sample size, with proportionsremember that the margin of error is
p 1 p
. 95% confidence makes z * 1.96 . What about p ? When in doubt, use 0.5!
m z*
n
0.5 0.5
2
1.96
So 0.01 1.96
, which solves

observational studies
& experiments
define observational studies and experiments
correlation vs. causation
Dr. Mine etinkaya-Rundel
Duke University
studies
observational
collect data in a way that does
not directly interfere with how
the data arise (

data basics
observations, variables, and data matrices!
types of variables!
relationships between variables
Dr. Mine etinkaya-Rundel!
Duke University
data matrix
country
cr_req cr_comply ud_req ud_comply
hemisphere
hdi
Argentina
21
100
134
32
southern

robust statistics
define robust statistics
robust measures of
center & spread
Dr. Mine etinkaya-Rundel
Duke University
robust statistics
we define robust statistics as measures on which extreme
observations have little effect
example
data
mean
median

measures of spread
range: (max - min)
variance
standard deviation
inter-quartile range
less variable
more variable
Dr. Mine etinkaya-Rundel
Duke University
sample
variance
population
variance
example
s =
2
variance
roughly the average squared deviation fr

measures of center
Dr. Mine etinkaya-Rundel
Duke University
shape
skewness
left skewed
symmetric
right skewed
modality
unimodal
bimodal
uniform
multimodal
mean
median
arithmetic average
midpoint of the
distribution
(50th percentile)
sample mean
populati

sampling &
sources of bias
census vs. sample
sources of bias
sampling methods
Dr. Mine etinkaya-Rundel
Duke University
census
Wouldnt it be better to just include everyone
and sample the entire population, i.e. conduct
a census?
Some individuals are h

experimental design
principles of experimental design
experimental design terminology
Dr. Mine etinkaya-Rundel
Duke University
(1) control
(2) randomize
compare
treatment of
interest to a
control group
randomly
assign subjects
to treatments
(3) replic

transforming data
define transformations
review when it might be useful/
necessary to transform data
Dr. Mine etinkaya-Rundel
Duke University
transformations
a transformation is a rescaling of the
data using a function
when data are very strongly s

visualizing
numerical data
scatterplots for paired data
other visualizations for describing
distributions of numerical variables
Dr. Mine etinkaya-Rundel
Duke University
data
income per person
life expectancy
($, 2012)
(years, 2012)
Afghanistan
1359.7
6

Pregnant I of Television Journalism story
Pregnant I full time minimum wage worker (2 - housekeeping)
Expert Interview Statition/Econmist
Buck Stops here who
A-Roll al the primary audio for your story, the SOTs and Vo
B-roll is all supporting vido for you

Name: _
AP Statistics
AP Review z & t
Intervals with Means
1) What is the critical value
for a 96% confidence interval
for a sample of size 20? (
unknown)
a) 2.054
d) 2.205
b) 1.96
e) 2.093
c) 2.197
2) Which of the following
statements is true?
a) A 95% c

Name: _
AP Statistics
Computer Data for Linear Regression
1. The decline of salmon fisheries along the Columbia River in Oregon has caused great concern among
commercial and recreational fishermen. The paper Feeding of Predaceous Fishes on Our-Migrating
J

Name: _
AP Review Free Response Questions Distributions
2003 Question 3: Mens shirt sizes are determined by their neck sizes.
Suppose that mens neck sizes are approximately normally distributed with
mean 15.7 inches and standard deviation 0.7 inch. A reta

Name: _
AP Statistics
Hypothesis Testing WS #1
1) For the following pairs, indicate which arent legitimate hypotheses and explain why.
a) H0: .4: Ha: > .4
b) H0: x = 16: Ha: x > 16
c) H0: = 24: Ha: > 24
2) For each situation, state the null and alternativ