summarize in your own opinion the course of European history in the twentieth century
Was the Second World War inevitable?
What implications and consequences were there in the aftermath of the Second World War and
Holocaust? How did these events shape hum
Chapter 10
Graphs, Good and Bad
Chapter 10
1
Why ?
Statistics deals with data
We use tables and graphs to present data
Tables and graphs help us see what data say
But not all tables and graphs do so accurately
or clearly.
Chapter 10
2
Example: What makes
Chapter 8
Measuring
Chapter 8
1
Measurement
We measure a property of a person or thing when
we assign a number to represent the property.
We often use an instrument to make a
measurement. We may have a choice of the units
we use to record the measuremen
Chapter 6
Experiments in the Real World
Chapter 6
1
Example: The case of fickle mice
In the real world experiments dont always go smoothly.
Even if they do we cant always take a firm stand on the
findings.
Is our behavior coded into our genes?
To find
Chapter 5
Experiments, Good and Bad
Chapter 5
1
Example: Online Learning
In a study at Nova Southeastern University, Florida
the authors claim that students taking
undergraduate courses online were equal in
learning to students taking the same course in
c
Chapter 3
What Do Samples Tell Us?
Chapter 3
1
Thought Question 1
During a medical exam, the doctor
measures your cholesterol two times.
Do you think both measurements would
be exactly the same? Why or why not?
Chapter 3
2
Thought Question 2
To estimate t
Review
Observational study and Experiment
Individuals, population and sample
Sample survey and Census
Chapter 2
1
Review
Observational Study
Observes individuals and measures variables of interest
but does not attempt to influence the responses.
Exp
Chapter 1
Where Do Data Come From?
Chapter 1
1
Thought Question 1
From a recent study, researchers
concluded that high levels of alcohol
consumption resulted in lower
graduation rates at colleges.
How do you think this study was carried
out in order to ge
Chapter 15: Describing Relationships:
Regression, Prediction ,and Causation
Goal
If a scatterplot shows a straight-line relationship between
two quantitative variables, we would like to summarize this
overall pattern by tting" a line to the data.
2
Exampl
Chapter 17: Thinking About Chance
Chance events in real life
We are inundated everyday with numbers which
quantify the chance of something occurring in the
future (perhaps to us); e.g.,
2
Chance events in real life
We are inundated everyday with numbers w
Chapter 14: Describing Relationships:
Scatterplots and Correlation
Introduction
A problem that often arises in the social sciences,
economics, industrial applications, and biomedical
settings is that of investigationg the mathematical
relationship between
Chapter 18: Probability Models
Example 1
Someone selects a chocolate at ramdom from the bag ?
2
Example 1
Someone selects a chocolate at ramdom from the bag ?
What does it mean that they select at random?
2
Example 1
Someone selects a chocolate at ramdom
STAT 1020 Exam 1 Name:
Part I : Multiple Choice, 3 pts each. Choose the BEST answer for each question.
Put the letter of our choice for each cuestion into this table.
24 25
.l
1. The Gallup Poll asks 1 1 l 1 American residents age 18 or over, "
STAT 1020 Midterm II
Note: You must Show all work for credit.
1. (20 pts) You ip a. coin four times, getting either head or tail on each.
(a) Display the complete sample space, showing all possibilities.(10
ptS)
(b) What is the probability of getting exac
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STAT 1020
Elementary Statistics
CRN: 25871 Section 013
Winter 2014
Monday, Wednesday, Friday 9:35 10:30am Room 113 State Hall
Instructor: Hailong Guo
Email: guo@math.wayne.edu
Office: 1138 FAB
Office Hours: M W 10:30 11:30am and by appointment
OVERVIEW
Th
Name:
Quiz 4
1. [10] In the Statistical Abstract we find these data on the marital status of adult
American women as of 1998:
marital status
never married
married
widowed
divorced
count (thousands)
21043
59255
11027
11078
Percentage
a) State the variable
STAT 1020 Quiz 9
1. Consider the situation of rolling an 8 sided die and a. 4sided die, and
then adding the resulting numbers.
(a) What is the probability model?
(b) What is the probability that the sum of two numbers will be 9?
(c) What is the probabilit
Quiz 7 Name:
Use the following to answer questions 12:
Here is a stemplot of the percent of males, 15 and older, who are illiterate in 139 countries, according
to the United Nations. For example, the highest illiteracy rate was 69%, in the African country
Name: Quiz 8
Use the following to answer questions 13:
Suppose that the Blood Alcohol Content (BAC) of students who drink ve beers varies from
student to student according to a normal distribution with mean 0.07 and standard deviation 0.01.
1. The middle
Quiz 5 Name:
Does using a cell phone while driving make an accident more likely? Researchers
compared telephone company and police records to find 699 people who had cell phones
and were also involved in an auto accident. Using phone billing records, they
Use the following to answer questions 4-5:
A researcher studied whether meeting regularly with a weightloss counselor helps dieters lose
weight. Eighty dieters were available for the study Half the dieters, assigned at random,
received weightloss counseli
Name: Quiz 2
1. Before the 2008 presidential campaign, Gallup Poll asked a SR8 of 1,000 Rhode
Island residents for whom they would vote for president; 620 said Obama. The margin of
error for 95% confidence for this poll is:
(a) 8% (b) 62% (c) 4% (d) 59%
Sample Problems for Chapter 9
1, p. 370
The manager of the Danvers-Hilton Resort Hotel stated that the mean guest bill for a weekend is $600
or less. A member of the hotels accounting staff noticed that the total charges for guest bills have been
increasi
Sample Problems for Chapter 8
1, p. 332
A simple random sample of 40 items resulted in a sample mean of 25. The population standard
deviation is = 5.
a. What is the standard error of the mean, ?
= 0.79
b. At 95% confidence, what is the margin of error?
=
Sample Problems for Chapter 7
9, p. 296
A simple random sample of 5 months of sales data provided the following information:
Month:
1
2
3
4
5
Units Sold:
94
100
85
94
92
a. Develop a point estimate of the population mean number of units sold per month.
=
Sample Problems for Chapter 5
7, p. 216
The probability distribution for the random variable x follows.
x
f(x)
20
25
30
35
.20
.15
.25
.40
a. Is this probability distribution valid? Explain.
Yes. The probabilities are all between 0 and 1.0 and they add to