Introduction to the Practice of Statistics 8e
Chapter 5
2015 W.H. Freeman and Company
5.1-1
Which of the following situations follow a binomial
distribution?
I. Recording the sex of 50 births at the local hospital.
II. A coin is flipped until there is a
Standard deviation s – standard error s/√n
[7] Inference for Distributions
For a sample of size n,
the sample standard deviation s is:
s=
n − 1 is the “degrees of freedom.”
1
∑ ( xi − x )2
n −1
The value s/√n is called the standard error of the mean SEM.
Table D
[7] Inference for Distributions
For df = 9 we only
look into the
corresponding row.
Lecture Notes
The calculated value of t is 2.7.
We find the 2 closest t values.
Simin Seury, Department of Economics, York University, Canada
Date: April 1 2010
2.
Class Test 2 : Solution
DATE:
2010
Instructor: Simin Seury
Faculty of Liberal Arts & Professional Studies
York University
AP/ECON 2500 3.0: Introductory Statistics for Economists I
Please note: the following only provides a brief guide. Your answer in exa
Class Test 3
DATE: Thursday, April-01-10
Instructor: Simin Seury
Faculty of Liberal Arts & Professional Studies
York University
AP/ECON 2500 3.0: Introductory Statistics for Economists I
Please note: the following only provides a brief guide. Your answer
R Feedback
Instructor: Simin Seury
[Please note: The following only clarifies about the common
mistakes in your assignment, so that you do not do this mistakes
again]
# Q1
# Stest has 3 entry, 1st one is your marks from Test-1, 2nd and
3rd entries are exp
Introduction to the Practice of Statistics 8e
Chapter 7
2015 W.H. Freeman and Company
7.11
It has been claimed that women live longer than
men; however, men tend to be older than their
wives.
Ages of 16 husbands and wives from England were
obtained. Thes
CHAPTER-5 Q AND ANSWERS
9.
a.
There are a total of 26,975 unemployed persons in the data set. Each probability f(x) is computed by
dividing the number of months of unemployment by 26,975. For example, f (1) = 1029/26,975 = .
0381. The complete probability