ECON5257
Introductory Statistics and Data Analysis
Week 2
May 7, 2015
ECON5257
May 7, 2015
1 / 49
Puzzle 1: a Google job interview question
The first part of this lecture will focus on probability theory, the
mathematical foundation of statistics. Probabi

ECON 5257
Estimating a Simple Regression Equation
Semester 2 -2016
David Wong, the president of a Hong Kong based consulting firm, is interested in the
relationship between environmental work factors and the employee turnover rate. He
defines environmenta

ECON 5257 Tutorial Class Questions for the week beginning on
17 October 2016
Questions 1-10 below come from the Berenson, Levine, Szabat,
Obrien, Jayne and Watson textbook: Basic Business StatisticsConcepts and Applications 4thth ed.
Question
1
2
3
4
5
6

ECON 5257
Practice Questions
Semester 2, 2016
Question 1
The city council of Dubbo, New South Wales has gathered data on the number of minor
road accidents and the number of youth soccer games that occurred in town over a
weekend.
X (soccer games)
25
45
1

ECON 5257
Introductory Statistics and Data Analysis
Week 5 Exercises - Answers
(5) (a) We can see two mean features in the data. First, there was a clear long term
downward trend in the proportion of insured Australians until 2000. Second, while
the propo

ECON 5257
Introductory Statistics and Data Analysis
Week 5 Exercises
(1) It is known that 80% of people suffering from a disease are cured by a certain
medication. A pharmaceutical company develops a new drug and claim that it is
more effective than the o

ECON 5257
Introductory Statistics and Data Analysis
Week 2 Tutorial Questions - Solutions
(T2) (a) The marginal probability is
P (under 20) = P (under $20 cash)+P (under $20 credit)+P (under $20 debit) = 0.17
(b)
P (cash|$20-$100) =
0.04
P ($20-$100 cash)

ECON 5257
Introductory Statistics and Data Analysis
Week 4 Exercises
Tutorial Questions
Please hand in question T1 at the beginning of your tutorial. The solutions
may be handwritten.
. You need to show all your calculations and demonstrate how you obtain

ECON 5257
Introductory Statistics and Data Analysis
Week 1 Tutorial Questions - Solutions
(T1) a. The observation units are throws in the first round of rock-paper-scissors. The
second part of the question is actually very difficult with the intention of

ECON 5257 Tutorial Class Questions for the week beginning on
19 September 2016
Questions 1-7 below come from the Berenson, Levine, Szabat,
Obrien, Jayne and Watson textbook Basic Business StatisticsConcepts and Applications 4thth ed. Note that the Excel d

ECON 5257 Tutorial Class Questions for the week beginning on
10 October 2016
Questions 1-10 below come from the Berenson, Levine, Szabat,
Obrien, Jayne and Watson textbook: Basic Business StatisticsConcepts and Applications 4thth ed.
Question
1
2
3
4
5
6

ECON 5257 Tutorial Class Questions for the week beginning on
03 October 2016
Questions 1-9 below come from the Berenson, Levine, Szabat,
Obrien, Jayne and Watson textbook: Basic Business StatisticsConcepts and Applications 4thth ed.
Question
1
2
3
4
5
6
7

ECON5257
Introductory Statistics and Data Analysis
Week 4
May 21, 2015
ECON5257
May 21, 2015
1 / 36
The four pillars of statistical inference
Significance: How strong is the evidence?
Generalisation: How broadly do the results apply?
Estimation: How large

ECON5257
Introductory Statistics and Data Analysis
Week 5
May 28, 2015
ECON5257
May 28, 2015
1 / 38
Statistical inference for a sample proportion
Consider a sample of n independent Bernoulli trials X1 , . . . , Xn . The
sample proportion Pb = i =1 Xi /n.

ECON5257
Introductory Statistics and Data Analysis
Week 3
May 14, 2015
ECON5257
May 14, 2015
1 / 51
Continuous probability distributions
A continuous probability distribution is the probability distribution
associated with a continuous random variable. Un

ECON5257
Introductory Statistics and Data Analysis
Week 6
June 4, 2015
ECON5257
June 4, 2015
1 / 22
Simple regression model
In the last lecture we introduced the simple regression model,
Yi = 0 + 1 Xi + i ,
i = 1, 2, . . . n,
and saw how to obtain to esti

ECON 5257 Tutorial Class Questions for the week beginning on
24 October 2016
Questions 110 below come from the Berenson, Levine, Szabat,
Obrien, Jayne and Watson textbook: Basic Business Statistics-
Concepts and Applications 4thth ed.
4 - 1 -
_

ECON 5257
Introductory Statistics and Data Analysis
Week 2 Exercises
Tutorial Questions
Please hand in questions T1 and T3 at the beginning of your tutorial. The
solutions may be handwritten.
. You need to show all your calculations and demonstrate how yo

ECON 5257
Introductory Statistics and Data Analysis
Week 3 Tutorial Questions - Solutions
(T2) The probability that your vote is decisive is the probability that there will be
a tie among the other board members, four in favour and four against the intere

4/9/2017
COPPER and ZINC
Introduction
Functions
Metabolism
Deficiency
1
COPPER AND ZINC
Cu and zinc are present in a wide range
of foods
Milk is a poor source of copper
2
FUNCTIONS OF ZINC
Cofactor for over a hundred different
enzymes in all branches of

ECON 5257
Introductory Statistics and Data Analysis
Week 1 Tutorial Questions - Solutions
(T1) a. The observation units are throws in the first round of rock-paper-scissors. The
second part of the question is actually very difficult with the intention of

The University of New South Wales
School of Economics
ECON5257 INTRODUCTORY STATISTICS AND DATA ANALYSIS
SOLUTIONS TO SAMPLE FINAL EXAM PAPER QUESTIONS
Semester 2, 2013
Time allowed: 120 minutes.
Reading time: 10 minutes.
Number of pages: 9
Total marks: 6

ECON 5257
Introductory Statistics and Data Analysis
Week 4 Exercises
Tutorial Questions
Please hand in questions T1 and T2 at the beginning of your tutorial. The
solutions may be handwritten.
. You need to show all your calculations and demonstrate how yo

ECON 5257
Introductory Statistics and Data Analysis
Week 2 Tutorial Questions - Solutions
(T1) (a) The marginal probability is
P (under 20) = P (under $20 cash)+P (under $20 credit)+P (under $20 debit) = 0.17
(b)
P (cash|$20-$100) =
0.04
P ($20-$100 cash)

ECON 5257
Introductory Statistics and Data Analysis
Final Exam - Semester 1, 2014
Time allowed: 120 minutes. Reading time: 10 minutes.
Total marks: 60.
This exam is divided in three parts. Please start each part of the exam on a
new page of the examinatio

ECON 5257
Introductory Statistics and Data Analysis
Week 5 Exercises
Tutorial Questions
Please hand in question T1 at the beginning of your tutorial. The
p=0.6
solutions may be handwritten.H0:
H1: p<0.6
P(Z<Zcalc)
M=0.6
. You need to show all your calcula

The University of New South Wales
School of Economics
ECON5257 INTRODUCTORY STATISTICS AND DATA ANALYSIS
SAMPLE FINAL EXAM PAPER
Semester 2, 2013
Time allowed: 120 minutes.
Reading time: 10 minutes.
Number of pages: 9
Total marks: 60 in total
There are fo