Chapter 3 Displaying and Summarizing Quantitative Data
3.1 Displaying Quantitative Variables
For quantitative variables there are no categories
o Slice up all of the possible variables into bins and then count the
number of cases that fall into each bin
Introduction to Statistical Reasoning
Homework #1
Due: 02/02/2011
Chapter 1
#1
Table 1.1 shows that Aspirin can potentially prevent heart attacks better than a placebo. with a
placebo 189 participants had heart attacks whereas 85 less participants (104) d
Project #2
Due: 03/28/2011
Sample Survey: What influences your college decision?
The purpose of this sample survey is to get a general idea of what influences a
high school seniors, from the United Nations International Schools class of 2011,
decision in
Bias, Variance, and MSE of Estimators
Guy Lebanon
September 4, 2010
We assume that we have iid (independent identically distributed) samples X (1) , . . . , X (n) that follow some
unknown distribution. The task of statistics is to estimate properties of t
Linear Algebra Abridged
Sheldon Axler
This file is generated from Linear Algebra Done Right (third edition) by
excluding all proofs, examples, and exercises, along with most comments.
Learning linear algebra without proofs, examples, and exercises is prob
14: Generalized Least Squares
ECON 837
Prof. Simon Woodcock, Spring 2014
We now return to our linear regression model, but depart from the assumption of spherical
errors. We call this the generalized regression model. We retain the linearity assumption,
E
Maximum Likelihood Estimation
Guy Lebanon
February 19, 2011
Maximum likelihood estimation is the most popular general purpose method for obtaining estimating a distribution
from a finite sample. It was proposed by Fisher about 100 years ago and has been w
The SAS Base Programming Exam is property of SAS Institute Inc. ("SAS") and may not be copied or
disseminated without the prior written consent of SAS.
SAS Certification: Base Programming Practice Exam
1.
A raw data file is listed below.
-|-10-|-20-|-30
s
Lecture notes on ridge regression
arXiv:1509.09169v1 [stat.ME] 30 Sep 2015
Version 0.02, September 21, 2015.
Wessel N. van Wieringen1,2
1
Department of Epidemiology and Biostatistics, VU University Medical Center
P.O. Box 7057, 1007 MB Amsterdam, The Neth
CHAPTER 1 STATS STARTS HERE
1.1 What is Statistics?
Data- any collection of numbers, characters, images other items that provide
information about something
Statistics is about variation
1.2 Data
Organize values into a data table to make the meaning cle
CHAPTER 2- DISPLAYING AND DESCRIBINT CATEGORICAL DATA
2.1 Summarizing and Displaying a Single Categorical Variable
MAKE A PICTURE
o Think, Show, Tell
Area Principle- a fundamental principle of graphing data which says that the
area occupied by a part of
Practice Midterm Exam
W4315 Fall 2011
Name:
1. Consider a regression where the explanatory variable is time:
Yt o 1t t
for t=1,.n
where the i are uncorrelated with E(i)=0 and 2(i)= 2.
(a) Compute the least squares estimate of 0 and 1.
(b) Show that the es
Lecture Notes, Stat 8109/3503
Linear Regression, Time Series
Lecture 1, Jan 22 starts here
1
Review of some statistics concepts
Random variable. A variable that takes on alternative values according to
chance. More specically, a random variable assumes di
Intro to Statistical Reasoning
Homework #11
Due: 04/26/2011
Chapter 23
#11
(a) Subjects with pet:
Null hypothesis: Stressful life events have no connection to annual doctor visits.
Alternative Hypothesis: Stressful life event are connected/correlate with
Introduction to Statistical Reasoning
Project 03
Due: 05/02/2011
PublicSafetyandLegalAffairs:NonstructuralandStructuralFires
The following graph represents linear regression, demonstrating a potential
relationship between structural fires and nonstructura
Introduction to Statistical Reasoning
Homework #7
Chp 12 9, Chp 16 1,11, 18
Chapter 12
#9
(a) i. (212/1525) x 100
=13.9%
ii. 465/4377
=0.106
iii. 212/1525
=0.139
iv. 465 to 3912
(b) Risk for younger group seeing a ghost = 212/1525 = 0.139
Risk for older g
Due: 02/28/2011
Project 1
When Video Games Get Problematic So Do Smoking, Drug Use and Aggression
Step 1: This study, When Video Games Get Problematic So Do Smoking, Drug Use and
Aggression, published by Science Daily, regards the affects video gaming has
Introduction to Statistical Reasoning
Homework #2
Due: 02/09/2011
Chapter 4
#5
a. A unit is a single individual or object to be measured and therefore a full-time college
freshman in this study. The population is the freshmen attending the 464 two- and fo
Introduction to Statistical Reasoning
Homework #3
Due: 02/16/2011
Chapter 5
#1
When acquiring data, the two variables usually studied are the explanatory variable and
the response variable. Under ideal circumstances everything would remain constant while
Melody Tai
Prof. Donaghue
Statistics 1001
23 September 2015
Homework 01
2. a) Yes, this claim can be tested by conducting a randomized experiment. In a randomized
experiment, typically a large number of people are picked out without knowledge of any
extra
Melody Tai
Prof. Anthony Donoghue
Statistics 1001
23 September 2015
Critiquing Studies Assignment
Who funded the study, and who conducted the study (and are they related)?
The study was funded by the Spanish Government Instituto de Salud Carlos III, Fondo
Introduction to Statistical Reasoning
Professor Donoghue
Homework #10
Chapter 22
#6
(a) Null Hypothesis: Working 5 hours a day at a computer does not contribute to
deteriorating eyesight.
Alternative Hypothesis: Working 5 hours a day at a computer does co