Homework 1(Due Friday 9/30)
* Please turn in HW at the beginning of lecture on Friday. Make sure it's
written on 8.5x11 white or lined paper and all pages are stapled. Don't
forget to write your full
Chapter 7: Survey Sampling and Inference
Survey Terminology
The population is the group of people or objects we wish
to study.
A parameter is a numerical value that characterizes some
aspect of the po
Chapter 4: Regression Analysis-Exploring
Associations Between Variables
Scatterplots
Scatterplots are the best way to start observing the
relationship and the ideal way to picture associations between
Exploring and Understanding Data !
& Statistical Graphs
!
!
Nathan Langholz
Chapter 1: Introduction to Data
Statistics
. is the science of conducting studies to collect, organize,
summarize analyze an
Tree Diagrams
Tree diagrams help us think through conditional probabilities
by showing sequences of events as paths that look like
branches of a tree
We often make tree diagrams when reversing the co
Chapter 2 Review
!
What type of graph is this? What kind of variable?
!
How would you describe the shape?
Chapter 2 Review
What type of graph is this? What kind of variable?
!
!
What does this graph s
Chapter 3
Numerical Summaries of Center and Variation
Part 3
Example
Consider the following test scores:
3, 79, 82, 83, 92, 94
What is the median?
Q1? Q3?
What is the IQR?
Left limit?
Right limit?
Are
Chapter 5
Probability
Part 1
Randomness
A situation where we know what outcomes could
happen, but we dont know which particular
outcome did or will happen.
However, we can calculate the probability wi
Chapter 5
Probability
Part 3
Associations in Categorical Variables
By looking at the table below, is there an association
between martial status and having a college
education?
If there is an associat
Chapter 4
Regression Analysis:
Exploring Associations between Variables
Part 1
Scatterplots
Scatterplots are the best way to start observing the
relationship and the ideal way to picture
associations
Chapter 4
Regression Analysis:
Exploring Associations between Variables
Part 3
Burger King Example
Lets look at the Burger King menu items example
again. We found that the slope is 0.97 and
intercept
Chapter 4
Regression Analysis:
Exploring Associations between Variables
Part 2
Linear Model
Correlation says there seems to be a linear
association between these two variables but it
doesnt tell us wh
Chapter 5
Probability
Part 2
Law of Large Numbers
The Law of Large Numbers says that the long-run relative
frequency of repeated independent events gets closer and
closer to the true relative frequenc
Chapter 5: Probability
Randomness
A random phenomenon is a situation in which we know
what outcomes could happen, but we don't know which
particular outcome did or will happen
However, we can calcula