The Gulf Tech Company
name of the student
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name of the student
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Business Statistics II - STAT222
name of the Dr
1
Contents:
Objectives and proposed solutions:.3
Histograms; the
A. Determine the least squares regression model?
=b 0+ b1 x=13,524.61+ 6,208.72 x
B. Find the least square regression line?
C. Interpret the coefficient b1?
The slope coefficient, b1 = 6,208.72 , that is, each additional GPA increases the salary
on averag
Qatar University
College of Business and Economics
Department of Finance and Economics
Spring 2010
Business Statistics I
Dr. H.Ghazzai
Name: _
I.D. #: _
First Exam
(20%)
Multiple Choice Questions (8 Marks)
Answer the following questions:
1. Which of the f
Business Stat I
Dr. Temimi
Fall 2015
Quiz 4
Version A
1. Consider an investment whose return is normally distributed with a
mean of 40%
and a standard deviation of 40%. What is the
probability that the return will be more than 40% ?
2. Find the following
Review-Chapter 1
1.
You take a random sample of 100 students at your university and find that
their average GPA is 3.1. If you use this information to help you estimate the
average GPA for all students at your university, then you are doing what
branch of
Chapter 9 Review
1. It is claimed that the average waiting time at an amusement park is 30 minutes with a
standard deviation of 15 minutes. A random sample of 65 lines was selected and,
therefore, the mean of this sample belongs to a sampling distribution
Additional Review Problems
Problem 1:
The following table lists the joint probabilities associated with smoking and
lung disease for 60 to 65 year-old men.
Smoke
r
He has lung disease
0.12
He does not have lung .17
disease
NonSmoker
0.05
Complete the tabl
Chapter 3
1.
Which of the following would not be a continuous random variable?
A Body temperature of small children.
B The distance in miles driven on a trip.
C Weight of students upon graduation from college.
D Number of attempts to make a field goal in
Chapter 4
1. Which of the following statistics is a measure of central location?
a. The mean
b. The median
c. The mode
d. All of these choices are true.
2. Which measure of central location is meaningful when the data are nominal?
a. The mean
b. The media
Stat 1 chp6
MULTIPLE CHOICE
1. An approach of assigning probabilities which assumes that all outcomes
of the experiment are equally likely is referred to as the:
a. subjective approach
b. objective approach
c. classical approach
d. relative frequency appr
Chapter 2
1. The classification of student major (accounting, economics, management, marketing,
other) is an example of a(n)
a. nominal random variable.
b. interval random variable.
c. continuous random variable.
d. parameter.
2. A researcher wishes to es
Chapter 5 Review Problems
Which of the following situations lends itself to cluster samples?
a. When it is difficult to develop a complete list of the population members.
b. When the population members are widely dispersed.
c. When selecting and collectin
STAT 220
EXAM 1 - REVIEW
1. Which of the following uses the least amount of information from the data concerning dispersion?
A) Standard deviation
B) Range
C) Variance
2. Which of the following is not the same as the other answers?
A)
B)
C)
D)
Second quar
Chapter 7 Review
1. Maria is not a good student. Her exam strategy is to rely on luck for the next quiz. The quiz
consists of 5 multiple-choice questions. Each question has four possible answers, only one of
which is correct. Maria plans to guess the answ
Business Stat I
Dr. Temimi
Review Chapter 6
1. If A and B are any two events with P(A) = .8 and P(B|A c) = .7, find P(Ac and B)
2. Suppose P(A) = 0.30, P(B) = 0.50, and P(B|A) = 0.60.
a.
Find P(A or B).
b.
Find P(A|B).
3. If two events are independent, wh
Chapter 8 Review
.
1. Find the following z-scores (z-values). Find the z-score (z) for the standard normal distribution
shown in the diagram below. Parts a, b and c are unrelated.
a)
0.2910
0
z
z = _
b) The random variable Z is the standard normal distrib
Tutorial on Hertz Contact Stress
Xiaoyin Zhu
OPTI 521
December 1, 2012
Abstract
In mechanical engineering and tribology, Hertzian contact stress is a description of the stress
within mating parts. This kind of stress may not be significant most of the tim
Rolling contact stresses between two rigid, axial and flat cylinders
Subhankar Das Bakshi
Department of Materials Science and Metallurgy, University of Cambridge, U.K.
E-mail : sd444@cam.ac.uk/subhankar.dasbakshi@gmail.com
1
Statement of Purpose of the co
5 Rigorous Treatment of Contact Problems
Hertzian Contact
In this chapter, a method is illustrated to find the exact solutions of contact problems in the framework of the half-space approximation. We examine, in detail,
the classical contact problem of n
Shigley's Mechanical Engineering Design
Tutorial 3-19: Hertz Contact Stresses
CHARACTERISTICS OF CONTACT STRESSES
1. Represent compressive stresses developed from surface pressures between two curved
bodies pressed together;
2. Possess an area of contact.
Elastic Compression of Spheres and Cylinders
at Point and Line Contact
By M. J. Puttock and E. G. Thwaite
National Standards Laboratory Technical Paper No. 25
Commonwealth Scientific and Industrial
Research Organization, Australia
Melbourne 1969
Printed b
7.2 Shear and Moment Equations
and Diagrams
To design a beam, you should know the variation
of the internal shear force (V) and bending
moment (M) acting at each point along the axis
of the beam.
The variation of (V) and (M) can be known by the
method o
QATAR UNIVERSITY / COLLEGE OF ARTS AND SCIENCE
DEPARTMENT OF MATHEMATICS, STATISTICS & PHYSICS
Statistical Simulation (STAT 372) Fall 2015
Take-home Exam
Instructor: Dr. Mohanad Fayez Al-khasawneh
GENERAL INSTRUCTIONS
1. This test has 1 page and 4 questio
QATAR UNIVERSITY / COLLEGE OF ARTS AND SCIENCE
DEPARTMENT OF MATHEMATICS, STATISTICS & PHYSICS
Statistical Simulation (STAT 32)
Fall 2015
Test #1, Monday 9 November 2015
Time: 12:30 1:50 pm
Name: _ Student ID: _
Instructor: Dr. Mohanad Fayez Al-khasawneh
Qatar University
College of Business and Economics
Fall 2014
Business Statistics 2
Group Project
Weight: 10%
Due Date: December, 28th
Estimating a Multiple Regression Model for GCC countries
Each group must choose ONLY ONETOPIC among the following topics: