Weekly Schedule for Stat 113 Spring 2008
Date Week Lecture Topic Material in Text 1 1 Producing Data: Production Types Chapters 1 and 2 2 REC1 2 3 Producing Data: Sampling Chapters 3 and 4 4 REC2 3 5
Name: _
STAT 113 Online Exam 1 Fall 2011
You may have one sheet of paper with notes handwritten in your own handwriting to take this test. Please SHOW ALL YOUR WORK to receive credit. When you fin
Name: _
STAT 113 Online Final Exam Fall 2011
You may have one sheet of paper with notes handwritten in your own handwriting to take this test. Please SHOW ALL YOUR WORK to receive credit. When you
Worksheet 4
Q1.
Company A:
Company B:
p
p
=0.43.
=0.342.
Company B is more reliable because the sample size is larger.
(Note: here we need to assume that there is no any non-sampling error.)
Q2.
Popul
Chapt 15
2. Answer may vary. One possible answer is least-squares regression line
3. b
4. a
5. 0.48
6. 2.4
7. -5.76
8. the target year in question 7 is outside the range of the data
9. 64%
10. -0.97 (
Name: _
Section: _
Quiz 8
Ch 17, 18, and 20
1. Write down your name and section number. (3pts)
2. If I toss a fair coin 5,000 times _(2pts)
A) the number of heads will be close to 2,500.
B) the propor
Worksheet 5
Question 1
Case 1: H 0 : p 0.4
Case 2: H 0 : 5
one-sided
H a : p 0.4
Ha : 5
one-sided
Case 3: H 0 : 10000 H a : 10000
two-sided
Question 2
Case 1
Case 3
Sampling distribution mean: p 0 0.4
Confidence Interval
04/02
What Does Mean/Proportion Not Tell You?
We do see lots of statistics every day. Here are a few facts which may cheer you up.
Fact: Almost 72% of all US internet users are on
Name: _
Section: _
Quiz 6
Ch 14
1. Write down your name and section number. (1pts)
(Group Quiz) Below is a plot of persons muscle mass and their ages. (3pts)
2. Circle the most appropriate answer for
Stat 113 Worksheet March 26th
Probability: The probability of an event is simply the proportion of times that event would occur in a
very long series of repetitions. It answers the question: What woul
Name: _
Section: _
Quiz 10
Ch 22
1. Write down your name and section number. (5pts)
2. If a significance test gives a P-value of 0.5 _(2pts)
A) the margin of error is 0.5
B) the null hypothesis is ver
STAT 113 Quiz 9
1) (Optional) Fill in the blanks below using these terms: (2pts)
Probability
Probability model
A _ for a random phenomenon describes all the possible outcomes
and says how to assign pr
Worksheet 6
Question 1
Case 1: False
Case 3: True
Case 2: False
Case 4: False
Question 2
1) 689/715. Marginal
2) 316/715. Joint
3) 6/322. Conditional
4) 20/391. Yes, it indicates an association betwee
Name: _
Section: _
Quiz 9
Ch 21
1. Write down your name and section number. (3pts)
Use the following to answer questions 2-3:
A recent Gallup Poll asked, Do you consider the amount of federal income t
Name: _
Section: _
Quiz 3
Ch8, Ch 10 and Ch 16
1: Write down your name and section number. (6pts)
2. You might try to measure how rich a person is by looking at the cat they drive. In fact,
driving a
Chance, Probability Model, and Expected Value
Recitation 3/26
Origin
You probably will come back to check those chapters before next time you visit Vegas.
Indeed, probability was firstly invented by g
Chapt 17,18,20
1. No. All the outcomes are independent.
2. 0
. 1
. 0.01
. 0.6
3. increase. Since it's getting more and more stable by the law of averages.
4. No. The same reason for 1
5. Yes. More bla
Name: _
Section: _
Quiz 4
Ch 11 and Ch 12
1: Write down your name and section number. (3pts)
2. A well-drawn histogram should have _(2pts)
A) bars with all the same width.
B) no space between bars (un
Plan for Today:
Chapter 1: Where Do Data Come From?
Chapter 2: Samples, Good and Bad
Chapter 3: What Do Samples Tell US?
Chapter 4: Sample Surveys in the Real World
The Purpose of Statistics:
Statisti
Name: _
Section: _
Quiz 2
Ch5 Ch6
1: Write down your name and section number. (5pts)
Use the following to answer questions 2-7:
Students in a large statistics class were randomly divided into two grou
Two-way Tables and the Chi-square Test
04/23
Two-way Table
Two-way table is a special way of displaying your data. Below is an example of displaying
the dataset using the two-way table,
Case study: Re
Plan for today:
Chapter 5: Experiments, Good and Bad
Chapter 6: Experiments in the Real World
What Is an Experiment?
Recall:
Observational study: does not attempt to influence responses.
Experiment: i
Plan for Today:
Chapter 14: Describing Relationships: Scatterplots and
Correlation
Scatterplot:
Persons muscle mass and their age
Scatterplot:
Basic principles to describe a scatterplot:
1) Form
e.g.:
Plan for today:
Chapter 13: Normal distribution
Normal Distribution
Normal Distribution:
Two variables we usually use to describe a sample.
(Although five-number summary is also a good choice.)
Measur
Worksheet 5: Hypothesis testing
04/16
A Brief Review
This is a follow-up chapter for confidence interval. Here are a few things you should
know from last week.
The notations:
1) Proportion questions:
Stat 113 Recitation
Week Nine Chapter 14
The POINT: When you have 2 quantitative variables and you want to look at the relationship between
them, you look at a scatter plot and the correlation between
Course assessment
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Homework: Regression
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performance in this course.
Course assessment
This attempt will impact your course performance
Homework: Regression
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performance in this course.
Course assessment
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Homework: Regression
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performance in this course.
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Homework: Summary statistics,Normal distribution
[now finished]
Total score: 24 out of 44, 55%
You have finished the assignment. Your
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Homework: Graphs [now finished]
Total score: 43 out of 44, 98%
You have finished the assignment. Your result is recorded on our datab