Western University (Ontario)  Also known as University of Western Ontario
Stats for Social Science and Business
STATS 2035

Fall 2017
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Western University (Ontario)  Also known as University of Western Ontario
Stats for Social Science and Business
STATS 2035

Fall 2017
Statistics 2035  Midterm Exam #1  Formula Sheet
Descriptive Statistics
To find the position of pth percentile, you need to calculate the index i = n(p /100)
BoxPlots:
Inner fences: Q1 1.5 IQR, Q3 + 1.5IQR,
Outer fences Q1 3 IQR, Q3 + 3 IQR, where IQR =
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Lecture 10  Relationships Between Measurement
Variables
February 6, 2017
8:34 PM
Strength Versus Statistical Significance:
A relationship is statistically significant if the chances of observing the relationship in the
sample when actually nothing is go
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Lecture 7  Summarizing and Displaying Measurement
Data
January 22, 2017
10:20 PM
Four kinds of Useful Information about a Set of Data:
1. Center
2. Unusual Values (Outliers
3. Variability  how spread out are the values
4. Shape
Measuring Center: The Mea
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Lecture 8  Bell Shaped Curves and Other Shapes
February 1, 2017
2:31 PM
Exploring a Distribution:
Sometimes the overall pattern of a large number of observations is so regular that we can describe it by a
smooth curve
The area of the shaded bars in thi
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Lecture 1  The Benefits and Risk of Using Statistics
January 9, 2017
2:58 PM
Statistics: It is a collection of procedures and principles for gaining ad analyzing information in order to help
people make decisions when faced with uncertainty
Obvious or No
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Lecture 3  Measurements, Mistakes, and
Misunderstandings
January 16, 2017
2:30 PM
We obtain samples from populations
We can draw conclusions about entire populations from samples
Simple Measures Don't Exist:
It is important to understand how the infor
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Lecture 4  How to Get a Good Sample
January 18, 2017
2:35 PM
Sample Surveys:
A subgroup of a large population is questioned on a set of topics
No intervention or manipulation of the respondents, simply asked t answer some questions
Randomized Experimen
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Lecture 9  Plots, Graphs and Pictures
February 6, 2017
8:20 PM
Categorical Data:
The best way to present categorical data is either as a bar graph of pie chart
A bar graph gives a visual display of the relative sizes of each category
A pie chart gives
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Lecture 5  Experiments and Observational Studies
January 18, 2017
3:20 PM
Explanatory and Response Variables:
Explanatory Variable
Is one that may explain or cause differences in a response variable
Response Variable
Is the outcome variable
Example:
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Lecture 2  Reading The News
January 11, 2017
2:05 PM
What are Data?
Data: plural word referring to a collection of numbers or other pieces of information to which meaning
has been attached
For example, numbers 1,3, and 10 are not necessarily data, but
Western University (Ontario)  Also known as University of Western Ontario
Probability and Statistics II
STATS 2858

Spring 2017
(Dill Ll SJUl'rUns
1. A vendor of milk produces and sells lowfat dry milk to a company that uses it to produce baby
formula. In order to determine the fat content of the milk, both the company and the vendor take
an observation from each lot and test it f
Western University (Ontario)  Also known as University of Western Ontario
Probability and Statistics II
STATS 2858

Spring 2017
SS 2858 a Quiz 3 Name: 5 O LUT/O/U
University of Western Ontario
Dept. of Statistical 59 Actuarial Sciences ID #:
1. A research article reports the following summary data on daily caffeine consumption for a
sample of adult women: n = 47, 2: = 215 mg and s
Western University (Ontario)  Also known as University of Western Ontario
Probability and Statistics II
STATS 2858

Spring 2017
SS 2858 Quiz 2 Name: SQiUil MS ,
University of Western Ontario
Dept. of Statistical 69' Actnortai Sciences [D #r , . , _
1. Let X1, . . . , X n be a random sample from a Rayleigh distribution with pdf:
fx(.c;=9) 6e e'z/QH, .1'>0,9>0.
(a) (4 marks) The sec
Western University (Ontario)  Also known as University of Western Ontario
Probability and Statistics II
STATS 2858

Spring 2017
Name: jOLU T/US
@ 610 It 16de W,
ss 2858 Quiz 1
University of Western Ontario, Department of Statistical 63 Actuarial Sciences
1 (5 marks) Explain the difference between and estimator and an estimate.
A 574ma1z0r 15 aprmciil'on (CL shdic) Ol' random var
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Chapter 17
Wednesday, March 22, 2017
12:30 AM
Coincidence  A surprising concurrence of events, perceived as meaningfully
related, with no apparent causal connection
If there is a statistical chance of an event occurring, it will occur someday,
somew
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Chapter 16
Tuesday, March 21, 2017
5:39 PM
People are more willing to pay to reduce their risk of something to zero, but not
as willing to pay to reduce their risk by the same amount to a nonzero value.
Also more likely to pay to increase probability
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Monday, March 20, 2017
Monday, March 20, 2017
2:34 PM
Chapter 17
1) Coincidences and Surprises
 Six degrees of separation: Take any random person in the world, and look
at all their friends. If you pick one of their friends and then repeat with
the new
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Wednesday, March 22, 2017
Wednesday, March 22, 2017
2:33 PM
Chapter 19
Population mean =
Sample mean = x
Even if grades themselves were left or right skewed, if we plotted all the means,
the shape of the histogram will be bell shaped
The Rule for
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Chapter 15
Tuesday, March 21, 2017
4:42 PM
Pvalue is the probability of observing a chisquare statistic as large as the one
observe or larger, if the null hypothesis is true
Randomization distribution is created by calculating chisquare statistic f
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Chapter 10
Monday, February 13, 2017
3:59 PM
Correlation: Measures the strength of a relationship between two variables
Regression: Numerical method for trying to predict the value of one
measurement variable based on knowing the value of another one
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Chapter 9
Saturday, February 11, 2017
3:37 PM
Some characteristics that all plots, graphs, and pictures of data should exhibit:
The data should be clear and stand out from the background
Clear labelling
A source for the data
As little "chart junk" (
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Chapter 7
Thursday, February 2, 2017
8:58 AM
Mean, median, mode, range
Bimodal does not necessarily mean the same mode is repeated twice. If there
are two clusters of data, each having their own prominent peak, then this is
bimodal, even if the peaks
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Wednesday, January 18, 2017
Wednesday, January 18, 2017
2:36 PM
Chapter 3
Open and closed questions good for exams
Credit card numbers and Student ID's are categorical variables, have no meaning.
Categorical vs. Quantitative most important
Age is quantit
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Chapter 8
Tuesday, February 7, 2017
4:50 PM
Area under entire frequency curve is 1, that's why the yaxis is simply labelled
"height of curve"
Height cannot be interpreted as proportion or frequency, is chosen simply to
satisfy the rule that the enti
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Chapter 3
Friday, January 20, 2017
4:36 PM
Reader should always be informed of whether the question was open/closed
If "don't know" or "no opinion" were options
Sometimes concept itself is hard to define (intelligence, happiness)
Attitudes and emotions mo
Western University (Ontario)  Also known as University of Western Ontario
Statistics 1023
STATS 1023

Spring 2017
Chapter 4
Sunday, January 22, 2017
5:06 PM
Sample Survey: Subgroup of a large population is questioned on a set of topics,
should be representative of whole population if chosen correctly
Experiment: manipulating the environment in some way, and measur
Western University (Ontario)  Also known as University of Western Ontario
STATS 2122

Spring 2015
September 15th, 2016
Criminology
Lecture 2
Assigned readings for next week
Are the dangers of internet pornography exaggerated?
There are two sides of the argument
o Wilkins argues Yes the dangers are exaggerated
o Trebilcock argues No the dangers of in
Western University (Ontario)  Also known as University of Western Ontario
STATS 2122

Spring 2015
Criminology
Lecture 5
September 29th, 2016
Domestic Abuse in Public Places
Does it make a difference if it were a female abusing a man or a man abusing a female
and why?
Sexual double standard regarding abuse?
Why is this a problem?
Abuse is abuse and