Based on a sample of 50 x-values having mean 35.36 and standard deviation 4.26,
(a)
test at the 0.05 level of significance the null hypothesis : = 34 versus
the alternative : 34.
(b)
find a 95% confid
1. Suppose, hypothetically, that the rates of return of stocks in a certain category
have mean 3.2 and standard deviation 5.0. The units here are percents. Assume
that these rates of returns are appro
Recitation 9
Chapter 22
25. Gender gap A presidential candidate fears he has a problem with
women voters. His campaign staff plans to run a poll to assess the
situation. Theyll randomly sample 300 men
MA200.2 Game Theory II, LSE
Problem Set 1
These questions will go over basic game-theoretic concepts and some applications. This
homework is due during class on week 4.
[1] In this problem (see Fudenb
Sampling
Distributions
An Overview of the Sampling Distributions of X and s 2
Ercan Karadas
New York University
[email protected]
Nov.12, 2015
Sampling
Distributions
Sampling Procedure
I
I
Sampling: selec
A Simple
Simulation
What is
Simulation?
The Main
Example
Simulation
Details
Results
A Simple Simulation Example using Excel
- A Preview of the Some of the Main Themes of the Course Ercan Karadas
New Y
Chapter 4: Foundations for inference
OpenIntro Statistics, 3rd Edition
Slides developed by Mine C
etinkaya-Rundel of OpenIntro.
The slides may be copied, edited, and/or shared via the CC BY-SA licens
Chapter 2: Probability
OpenIntro Statistics, 3rd Edition
Slides developed by Mine C
etinkaya-Rundel of OpenIntro.
The slides may be copied, edited, and/or shared via the CC BY-SA license.
Some images
Chapter 3: Distributions of Random Variables
OpenIntro Statistics, 3rd Edition
Slides developed by Mine C
etinkaya-Rundel of OpenIntro.
The slides may be copied, edited, and/or shared via the CC BY-S
Chapter 7: Introduction to linear regression
OpenIntro Statistics, 3rd Edition
Slides developed by Mine C
etinkaya-Rundel of OpenIntro.
The slides may be copied, edited, and/or shared via the CC BY-S
Inferences about Single Sample
Proportions and Means
Confidence Intervals
Estimating Proportions with Confidence
Thought Questions
1. A 95% confidence interval for the proportion of adults in
the U.S.
Sampling Distribution Models
Central Limit Theorem
Thought Questions
1.
40% of large population disagree with new law.
In parts a and b, think about role of sample size.
a. If randomly sample 10 peopl
Inferences about Single Sample Means
Hypothesis Testing
Hypotheses
Hypotheses are working models that we adopt temporarily.
Our starting hypothesis is called the null hypothesis.
The null hypothesis,
t]. CPMP and word problems.
Ha:ThenteanscoreotCPMPstudentsistbesanleastherneanscoreoi
traditionalstudents. (c=r or ,uCpT=D)
HA: The mean score of CPIVEP students is different from the mean score of
tr
Reasoning with Uncertainty
More about Hypothesis Testing
P-values, types of errors, power of a test
P-Values and Decisions
Your conclusion about any null hypothesis should be
accompanied by the P-valu
41. Cereals.
a] He: There is no linear relationship between the number of calories and the
sodium content of cereals. (,6: = [1']
HA: There is a linear relationship between the number of calories and
Ch 1Describing
Data: Graphical
Overview
Descriptive
Statistics
Categorical Data
Chapter 1- Describing Data: Graphical
Numerical Data
Presentation
Errors
Ercan Karadas
New York University
[email protected]
Ch. 3 Counting and
Probability
Notes
Sample Space
Counting
Formulas
Basic Definitions
Ch. 3 - Basic Principles of Counting and Probability
Probability Rules
Conditional
Probability and
Independence
Re
Predictive analytics
Data mining
Census
Quantitative variable
Categorical variable
Observation
Descriptive statistics
Sample survey
Population
Data
The set of analytical techniques that use models
con
Midterm 2: Revision
Srijita Ghosh
April 3, 2015
Regression
Chapter 9,10
Chapter 9
Be careful about extrapolation, i.e estimating y for an extreme value
of x, dubious
Outliers: unusual point
leverag
On time
Not
Total
Moe
Day
90 90%
10 10%
100
Night
10 50%
10 50%
20
Total
100 83
20 17
120
On time
Not
Total
Jill
Day
19 95%
1 5%
20
Night
75 75%
25 25%
100
Total
94 78
26 22
120
Time variable is not i