Chapter 7
Random Variables and
Probability Distributions
Random Variable AA grocery store manager might be
numerical variable whose value
interested in the number of broken
depends on the outcome of of chance
a
eggs in each carton (dozen
experiment eggs).
Chapter 5
Summarizing Bivariate
Data
Weight
Suppose we found the age and weight
for each person in a sample of 10
adults. Is there any relationship There
between the age and weight of does not
these
appear to
adults?
Do you think there is a be a
relations
Chapter 9
Confidence Intervals
Suppose we wanted to estimate the
proportion of blue candies in a VERY
large bowl.
How might we go about estimating this
proportion?
We could take a a
We would have
sample of candies
sample proportion
and a statisticthe
or c
Chapter 12
The Analysis of
Categorical Data and
Goodness of Fit Tests
Suppose we wanted to determine if the
proportions for the different colors in a
large bag of M&M candies matches the
proportions that the company claims is
in their candies.
k is used t
Chapter 4
Numerical Methods
for Describing Data
Population characteristic
Suppose we want to know the MEAN
-length of all the fish in Lake Lewisville .
Fixed value about a population
.
Is this a value that is known?
Typical unknown
Can we find it out?
At
Chapter 2
Collecting Data Sensibly
Note: Correct usage of the vocabulary in this
chapter is VERY important!
Consider the imply that spanking is the
These headlines following headlines
CAUSE of the observed difference in 25,
which occurred on SeptemberIQ.
Chapter 6
Probability
Suppose two six-sided die is rolled and
they both land on sixes.
Or a coin is flipped and it lands on
heads.
Or record the color of the next 20 cars
to pass an intersection.
These would be examples of chance
experiments.
Chance exper
Chapter 13
Simple Linear
Regression and
Correlation: Inferential
Methods
Suppose we were to investigate the
relationship between y = the first-year
college grade point average and x = high
school grade point average.
The first-year college grade
Is point
Chapter 8
Sampling Variability and
Sampling Distributions
Suppose we are interested in finding the
true mean () fat content of quarter-pound
hamburgers marketed by a national fast
food chain. To learn something about , we
To answer these questions, we wil
Chapter 14
Multiple Regression
Analysis
What is the general purpose of
regression?
To model the relationship between the
Multiple regression can be used to fit
dependent variable y (response) and one or
models to data with two or more
more independent va
Chapter 1
The Role of Statistics
and the Data
Analysis Process
What is statistics?
the science of collecting,
analyzing, and drawing
conclusions from data
Why should one study
statistics? Can dogs help
patients with
1. To be informedheart failure by
.
a)
Chapter 3
Graphical Methods
for Describing Data
Graphs for
categorical data
Double Bar Charts
When to Use
Categorical data
How to construct
Constructed like bar charts, but with two (or
more) groups being compared
MUST use relative frequencies on the
ve
Assignment 1 Part II
Question 1
A random sample of adults was asked how many books they typically read in a year. The
following contingency table shows these results along with their age group.
Less than 40 Years Old
40 Years or More
None
15
27
1-2
Chapter Terms
Chapter 1: An Introduction to Statistics
- Statistics: a way of reasoning, along with a collection of tools and methods, designed to
help us understand the world
- Data: Data are values, along with their context
Chapter 2: Data
- Business An
Week 1 Q&A:
Qu.#1
According to an article published in 2005, in a Canadian Financial
affairs magazine, RRSPlans permit employees to shift parts of their
before tax income into various investment vehicles. Employers
typically match 100% of the employees co
ASSIGNMENT#3
BUSr1065/ECON211s
Name
Totalpossiblemarks: 34
PartA-ChapterNine
L.
l) .,6,)eps
22 MARKS
Of the 14774 families living in the town of West Falls, a random sample of 720 families was taken to determine
the mean family income. A90% confidence int
Assignment 5
Due date: 25 November 2009
Total number of points: 21
Q1. (7.11) A study was conducted to determine whether relaxation training, aided by biofeedback and meditation, could help in reducing high blood pressure Subjects were randomly allocated
Assignment 4
Due date: 16 November 2009
Total number of points: 27
Q1. (6.39) In a natural population of mice near Ann Arbor, Michigan, the coats of some individuals are white-spotted on the belly. In a sample of 580 mice from the population, 28 individua