Chapter 11 Part 1
Confidence Intervals
for the Population
Mean
Ronnie McGinness
Lecturer of Economics
The University of Mississippi
2014
E (X )
= the Population Mean
The Population Mean is a
population parameter (and a
constant).
To observe the Populatio
Chapter 9 Part 2
Confidence Intervals
for the Population
Proportion
Ronnie McGinness
Lecturer of Economics
The University of Mississippi
2015
(1 )100% Confidence Interval
for p
the sample proportion
= alpha = the area outside of
the confidence interval.
i
1. Example 1
The population consists of salaries for 2500 managers.
The population mean is $51,800 and the population standard deviation is $5000.
What is the probability that the sample mean will lie between $51,300 and $52,300 if the
sample size is equa
Ch5
1.The following is a probability distribution.
x
1
2
3
4
f(x)
1/10
2/10
3/10
4/10
(a)Is it valid?
(b)Write the probability function for this distribution.
2.Car sales vary from 0 to 5 per week. The probability distribution for car sales is:
x
0
1
2
3
ch.6 Practice Problems
1. Assume that the time (in hours) until failure of a transistor is a random variable.
Where the average lifespan of a transistor is 100 hours.
(a) Find the probability that the transistor will last more than 15 hours.
solution:
15
ch.6 Practice Problems
1. Assume that the time (in hours) until failure of a transistor is a random variable.
Where the average lifespan of a transistor is 100 hours.
(a) Find the probability that the transistor will last more than 15 hours.
(b) Find the
1. The population consists of yes/no responses from 2500 managers.
The population proportion is 60%.
What is the probability that the sample proportion will lie between 55% and 65% if the
sample size is equal to 30?
2. The population consists of all colle
Summer 2017
Exam 2
Name _
1. Twenty-three percent of Ole Miss students are from out of state. In a random sample
of 6 students, what is the probability that at least 2 of them are from out of state?(round
to whole number)
a. 42%
b. 7%
c. 28%
d. 64%
e. non
Chanat Petchsangngam
Regression Analysis Project
Introduction
The Regression Analysis Project is written to find the model that best estimate the relation
between literacy rate and GDP per capita. The ANOVA is performed together with Tukey
and Mostellers
VEE Fall 2014 Regression Analysis Student Project
Birth rate in Taiwan
Yen-Chen Lin
Introduction
In Taiwan, the birth rate declined gradually . So I would like to know the relationship between the birth rate
in Taiwan and some factors such as marriage rat
1
Name: Brad Rockers
Course: Regression Analysis
Session: Fall 2008 VEE Student Project
Development of Regression Model for Obesity
I. Introduction
Obesity has become a major problem in America. While obesity has impacted all 50 states, obesity rates by
s
Name: xxxxxx xxxxx xxxxxx xxxx
Student Project: Catholic Schools in United States of America
Introduction
Session: Fall 2016
Course: Time Series
Catholic Schools in United States of America
The predominant religion in the Philippines is Roman Catholic, he
Economics and Business Statistics (ECO 3411)
Final Exam Review
Duration: 1 hour 15 minutes
Full Marks: 80 points (worth 30% of the total course grade)
(8 questions) x (10 points/question) = 80 points
Note: Do not forget to attach corresponding Minitab out