Classroom discussion 1
To be discussed on 3rd week
1. In the US the salaries of superstar professional athletes receive much attention in the
media. The multi-million dollar long-term contract is now commonplace among this
elite group. Nevertheless, rarel
STAT101
INTRODUCTORY
STATISTICS
Who am I
Dr. Lin Ting Kwong
Senior Lecturer of Statistics
School of Economics
Research interest in Survey Sampling
SOE 05-045
Email address: tklin@smu.edu.sg
Consultation Hours
Wednesday and Thursday
10.30 am to 11.30 am
SO
Classroom discussion 6
On 10th week
1. In leaving for school on an overcast April morning you make a judgment
on following null hypothesis. H 0 : The weather will remain dry.
What would be results be of Type I and Type II errors?
A. Type I error: get dren
Years that the individual has been playing a stringed instrument and neuronal activity index
("D5 dipole strength, in nA-m") for nine stringed musicians and six controls.
Years
0
0
0
0
0
0
5
6
8
10
12
13
17
18
19
Activity
5
6
7.5
9
9.5
11
16
16.5
11.5
16
(CED
A,“ M W Wei-c.0947: ﬁfb‘ircbmibrzgmgguma’uls
Low Kang Li
G1 1’s Example 13
1b) let u be the true mean human body temperature in ‘F.
x = 98.22356 1- Ho =u298.6
o. = 2. H1 : H. <
n = 93 4. since n = 93 > 30, by C.L.T & since 0 is known, 2 = 6" ~ N (
G8 Practice 8 Solutions
Q1 (DONE BY FOO KAI XIN MEGAN, G8)
Q2 (DONE BY THAM KAI RONG & PEK TIONG AUN SEAN, G8)
Let p be the true proportion of those who passed away in the month immediately before their birth
month.
n = 348, Ps = 0.046, = 0.01
H: p > 0.08
G10 Practice 3 Solutions
Q1 (DONE BY TENG JIA XIN, G10)
(a) Sample size : 26
Number of N (Not being defied): 20
Chance of the January Barometer holding true: 20/26 = 10/13
(b) 20/ 26 = 0.5
X~ B (26,0.5)
P(X >=20) =
1.
A
computer
is
programmed to compute
various chances. Match
the numerical answers
at
left
with
the
verbal descriptions at
right, which may be
used more than once.
Statistics
Practice 3
2.
WHO is this guru Marilyn? Marilyn vos Savants fame for her 228 IQ
S
T
A
T
I
S
T
I
C
S
P
R
A
C
T
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Photo: Yours truly, 27th June 2013,
Perth, Australia.
5
1.
Tackle the liquid of life: BLOOD
2. IN 1999, the Detroit Free Press ran a story of alleged cheating by police officers on
an official police sergeants examinati
United Airlines Flight Arrivals at Chicago O'Hare (n = 278 flights)
Data are for Tuesday, April 26. 2005.
Data are for Tuesday, April 26. 2005.
Source: http:/www.bts.gov
Source: http:/www.bts.gov
Obs
Flight Number
Tail Number
Origin Airport
Scheduled
Arri
Term 1, 2015/2016
STAT 101 INTRODUCTORY STATISTICS - GROUPS 11, 12, 13, 14 & 20
Class Exercise 1 Solutions
1.
(An SMU employees point of view) As an SMU employee, I feel that it is not ethical to
force a group of students buying the recommended textbooks
Answers & Solutions to Mid-Term Test
Term 1, 2012/13
1. (a) The answer is C since
pX (u) > 0 for u = 8, 9, 10, 11, 12 for the given PMF,
P (8 < X < 12) = pX (9) + pX (10) + pX (11),
the other probabilities includes the above sum in addition to either p
Classroom discussion 6
On 11th week
1. In leaving for school on an overcast April morning you make a
judgment
on following null hypothesis. H 0 : The weather will remain dry.
What would be results be of Type I and Type II errors?
A. Type I error: get dren
Classroom discussion7
1. Many people use scanners to read documents and store them in Word files. To
help to determine which brand of scanner to buy, a student conducts an
experiment where 8 documents are scanned by each of the two scanners he is
interest
AREA UNDER THE NORMAL CURVE
A. Area under the normal curve
Refer to Table 5.6 in Spatz (1997, p. 120,)
B. Shows the unit normal curve, also
called the standard normal curve
1. segmented by z-scores
2. for a population, z =
z =
x x
s
x
, while for a sampl
STAT 101: INTRODUCTORY STATISTICS
TOPIC: PRACTICAL APPLICATIONS OF
STATISTICS & PROBABILITIES
Instructor: Professor Kwong Koon Shing
Date of report submission: 28 March 2016
Caffeine and Energy Drinks Consumption & Sleep
Class: G2
Group 4
Report written b
School of Economics
Academic Year 2016-17
Term 1
COURSE CODE & COURSE TITLE : STAT101 Introductory Statistics
Instructor Name
Email
Tel
Office
:
:
:
:
Lin Ting Kwong
tklin@smu.edu.sg
6828-0960
SOE 05-45
COURSE DESCRIPTION
The purpose of this course is to
Covariance Example
Investment Returns
The Mean
Consider the return per $1000 for two types of
investments.
Economic
P(XiYi) Condition
Investment
Passive Fund X Aggressive Fund Y
0.2
Recession
- $25
- $200
0.5
Stable Economy
+ $50
+ $60
0.3
Expanding Econo
Sampling and Sampling distribution
Sampling
Why sample?
Cheaper :
n<N
n is determined by budget, time, resources and the level of
accuracy desired in the survey study.
Faster
n<N
N is determined by the nature of the problem
e.g. Interested in income of th