Some Important Concepts
Some important concepts in statistics
population: all individuals of interest
sample: a subset of population
parameter: a population characteristic (e.g., mean )
statistic: a s
Data displays and summaries
The first step in data analysis is
exploratory data analysis (EDA).
It is important to recognize different types of
variables (data).
There are two types of variable (data)
Lab 3: Regression
PreReading
STAT 200
In lab 3, we will investigate the relationship between two variables using linear
regression and use models to make predictions.
Objectives
Perform a regression
Lecture notes, Lang Wu, UBC
1
Chapter 2. Finding Relationships in Data
2.1. Relationship Between Two Continuous Variables
In the previous chapter, we were introduced to data with one variable. In prac
Lecture notes, Lang Wu, UBC
1
Chapter 3. Study Designs
In the previous chapters, we worked with data that were already available for
analysis. In this chapter, we discuss how to collect good data. Thi
Lab 1: Welcome to the Laboratory!
Fall Term 1, 2016/2017
Objectives:
Introduction to the lab environment.
Log into your statistics account
Get to know your directories
Construction of groups
Intr
Correlation
The relationship between two continuous variables can be
displayed by a scatterplot of their data.
The correlation (or correlation coefficient) r measures the
strength of a linear relation
Lab 2: Descriptive Statistics
PreReading
Objectives
Be able to use Rcmdr to
Calculate measures of center and spread
Create a histogram
Create a boxplot
Obtain fivenumber summary
Understand the
Lecture notes, Lang Wu, UBC
1
Chapter 1. Data Displays and Summaries
1.1. Introduction
Statistics is about learning from data, It is a way to extract information and help people
make decisions in the
Social Psychology, pt3
(intimidation, then groups of two)
PSYC102005 and 006
February 26th, 2016
24Feb16
Social 2
2
Intimidation: Forcing Behaviour
In many cases, people dont try and change our att
STAT 200
Chapter 15
Sampling Distribution Models
Population vs. sample, parameter vs. statistic
Population vs. sample, parameter vs. statistic
The complete collection of individuals that we want to s
STAT 200
Chapter 6 Scatterplots, Association, and Correlation
Motivating Examples
Question #1:
intelligent?
Do people with bigger brains tend to be more
Statistical process of investigation:
1. Formul
STAT 200
Chapter 3
Displaying and Summarizing Quantitative Data
Graphical presentations of distributions of quantitative data
Histogram
Stemandleaf display
Boxplot
Eugenia Yu, UBC Department of S
Winter 2013 STAT 200
Chapter 26
Comparing Counts
Objective: to test the significance of associations between two
categorical variables
Example: Is smoking status independent (not associated) with he
Winter 2013 STAT 200
Chapters 23 Inferences About Means
Let y be a variable that follows a certain distribution with mean and
standard deviation . If we have a large enough sample size n, and other
n
Winter 2013 STAT 200
Chapter 28 Analysis of Variance
Objective: to compare the means of three or more independent
populations
Examples:
Comparison of mean annual income among 4 populations: univers
Circle the correct answer (Q1—Q4, 1 mark each):
1. Suppose a simple random sample is selected from a population with mean u and variance 02.
2.
3.
The central limit theorem tells us that
(A) the sampl
STAT 200
Chapter 5
The Standard Deviation as a Ruler and the Normal
Model
How do shifting and scaling the data affect the mean, SD and other
summary statistics?
1. Shifting the data
add a constant c
STAT 200
Chapter 1 Stats Starts Here
What is Statistics?
Statistics is a science that involves the design of studies, data collection,
summarizing and analyzing the data, interpreting the results and
STAT 200
Chapters 7 & 8 Linear Regression
Objective: to describe a linear relationship between two quantitative
variables using a model. The model fits a straight line to the data, and
can be used to
STAT 200
Chapter 4
Understanding and Comparing Distributions
Comparing Distributions with Histograms
When we are comparing two or more distributions using the histogram,
one should plot the histograms
STAT 200
Chapter 2 Displaying and Describing Categorical Data
Displaying Data for Categorical Variables
For categorical data, the key is to group similar things together.
I. Frequency tables / Relativ
STAT 200
Chapters 1214 Probability and Random Variables
Do you ever wonder how email spam filters work? In simple terms,
algorithms are developed to screen incoming emails. Each email message
is assi
STAT200, Homework Assignment No 1
(Due: Friday, February 3, by 3:30pm, 2017)
Name
Student ID
Lab (session number and day/time, e.g., L2A, Mon, 4pm)
You must include this cover sheet when handing in yo
STAT200, Homework Assignment No 2
(Due: Friday, March 24, by 3:30pm, 2017)
Name
Student ID
Lab (session number and day/time, e.g., L2A, Mon, 4pm)
Note: You must include this cover sheet when handing i
Sample STAT 200 Midterm Exam (II)
Time: 50 minutes
Note: A normal table is provided.
Problem 1. Circle the correct answer: true (T) or false (F).
(a) For the sampling distribution to approximate the n
STAT 200 Assignment 2
Winter 2017/18 Term 1
Please attach a cover sheet (posted on Connect) when you hand in the assignment.
Due: Friday Nov 17, 4pm in the STAT200 dropbox in ESB (No late homework wil
STAT 200, Lang Wu
1
Chapter 3. Type of Studies and Experimental Design
3.1. Some Concepts
In practice, data are often obtained either in designed experiments or in observational studies (including sam
STAT 200, Lang Wu
1
Chapter 2. Finding Relationship in Data
2.1. Relationship Between Two Continuous Variables
So far we have mostly focused on data from one variable. In practice, we usually
have dat
Activity 3 Applications of 68%95%99.7% Rule
1
Introduction
Recall, if data follow a normal distribution, we expect that

about 68% of data fall within 1 standard deviation of the mean
(or in betwee
STAT200 Elementary Statistics for Applications, Winter Session Term 1, 2017
1
Information
Instructor
Ken Li
[email protected] (always the best and fastest way to reach me)
When you send me an email,
Simpsons Paradox
The following are data on a total of 1300 surgeries performed in two hospitals. The number of patients who had
delayed discharge is given separately for two hospitals
Number of delay
Review on Summarizing Categorical Data
A random sample of 75 UBC students who voted in the transit referendum was asked the following questions:
1.
Where do you live?
2.
In the transit referendum, did