Chapter 5
Experiments, Good and Bad
Chapter 5
1
Thought Question 1
In studies to determine the relationship between two
conditions (activities, traits, etc.), one of them is often
defined as the explanatory (independent) variable and
the other as the outc
Chapter 7
Data Ethics
Chapter 7
1
Thought Question 1
Many new treatments for rapidly lethal diseases
offer very little or no benefit to patients. Thus,
clinical trials to study the effectiveness of these
treatments require large numbers of participants
to
Chapter 8
Measuring
Chapter 8
1
Thought Question 1
A local health club is doing a survey to see
if there is a relationship between strength
and fitness. They want to measure the
strength and fitness of a sample of 100
members of the club. Which of these t
Chapter 9
Do the Numbers Make Sense?
Chapter 9
1
Thought Question 1
In 1994, according to the Department of
Labor, the median salary for government
workers was $29,528, while the median
salary for private workers was $26,494.
Conservative groups have clai
Chapter 10
Graphs, Good and Bad
Chapter 10
1
Thought Question 1
What is confusing or misleading about the
following graph?
21
20
19
18
17
Interest Rate
16
15
House hold
B ank
Ce ntral
B ank
Chapter 10
Ave rage
Bank
CHOICE
VIS A
2
Distribution
x
Tells what
Chapter 11
Displaying Distributions with
Graphs
Chapter 11
1
Thought Question 1
Two internet providers are being compared
in terms of how long it takes to download
large media files. Over a two month period
the download times of the same 100 media
files (
Chapter 12
Describing Distributions with
Numbers
Chapter 12
1
Thought Question 1
Suppose you are helping to prepare a
meal for the homeless at a local shelter,
and you are told that on average about
25 people attend such meals. Is there
anything else you
Chapter 13
Normal Distributions
Chapter 13
1
Thought Question 1
Birth weights of babies born in the United
States follow, at least approximately, a
bell-shaped curve. What does that mean?
Thought Question 2
What does it mean if a persons SAT score
falls a
Chapter 14
Describing Relationships:
Scatterplots and Correlation
Chapter 14
1
Thought Question 1
For all cars manufactured in the U.S., there
is a positive correlation between the size
of the engine and horsepower. There is a
negative correlation between
Chapter 15
Describing Relationships:
Regression, Prediction, and
Causation
Chapter 15
1
Thought Question 1
From a long-term study on several families,
researchers constructed a scatterplot of the
cholesterol level of a child at age 50 versus
the cholester
Chapter 16
The Consumer Price Index and
Government Statistics
Chapter 16
1
Thought Question 1
Bob drives a Honda Accord LX. When he
bought it in 1986, it cost about $11,500. A
comparable new Honda Accord LX today costs
about $19,905. How has the price of
Chapter 17
Thinking About Chance
Chapter 17
1
Thought Question 1
Here are two very different probability questions:
If you roll a 6-sided die and do it fairly, what is
the probability that it will land with 3 showing?
What is the probability that in you
Chapter 18
Probability Models
Chapter 18
1
Probability Rules
Four simple, logical rules which apply to
how probabilities relate to each other
and to real events.
x Review the rules at the beginning of
Chapter 18.
x Review the examples presented in
Chapter
Chapter 19
Simulation
Chapter 19
1
Thought Question 1
(a) When flipping a fair coin numerous times, each
outcome is said to be independent of the other
outcomes. What does this mean?
(b) When flipping a fair coin, the probability of
heads is 1/2. What is
Chapter 20
The House Edge:
Expected Values
Chapter 20
1
Thought Question 1
Suppose that a sorority pledge class is
selling raffle tickets to raise money. The
grand prize is a $200 gift certificate to the
campus bookstore, and the pledges must
sell all 100
Lecture 1:
Where do data come from?
S100 Statistical Literacy
Fall 2012
Introductory Comments
Statistics are powerful, persuasive and can
therefore be misleading when used in
ignorantly, lazily, or dishonestly.
Statistics = science of data
Statistician
Lecture 2:
Samples, Good and Bad
S100 Statistical Literacy
Fall 2009
Sampling
In sampling, we want to choose as representative a
subset of the population as possible.
When representative, the answer is close to the truth
When not representative, the an
Chapter 6
Experiments in the Real World
Chapter 6
1
Thought Question 1
Suppose you are interested in determining if drinking a
glass of red wine each day helps prevent heartburn. You
recruit 40 adults age 50 and older to participate in an
experiment. You