Land, Food, and Community: Quantitative Data Analysis
LFS 252

Spring 2016
Introduction: What is Food Science and The Canadian Food System
January 5th
What is Food Science?
Multidisciplinary
Application of basic principles of science and engineering to study and find knowledge on
physical, chemical and biochemical aspects of foo
Land, Food, and Community: Quantitative Data Analysis
LFS 252

Spring 2016
Chapter 1: The Nature of Probability and Statistics
January 5th
What is statistics?
The science of conducting studies to collect, organize, summarize, and anaylze and draw
conclusions from data
Descriptive Statistics: process of collecting, organizing, su
Land, Food, and Community: Quantitative Data Analysis
LFS 252

Winter 2014
Conditional Probability
Recall that the probability of an event occurring given that another event has already
occurred is called a conditional probability.
The probability that event B occurs, given that event A has already occurred is
P(BA) = P(A and B
Land, Food, and Community: Quantitative Data Analysis
LFS 252

Winter 2014
Measures of Centre
The four measures of center are mean, median, mode, and midrange.
Mean The mean is what you know as the average. It is calculated by taking all
of the values in a set and dividing them by the total number of values in that set.
The mean
Land, Food, and Community: Quantitative Data Analysis
LFS 252

Winter 2014
Lecture 3. Measures of
Centre and Variation
L FS 252 L A N D, FOOD, AN D COMMUN I TY: QUAN T ITATIVE DATA AN ALYSIS
JA N UA RY 2 0 1 4
I N STRU C TOR: VA L E RIA CA ST EL LANOS
LFS 252  LECTURE 2, JANUARY 2014
1
1. Recap from last class
1. Distribution:
Land, Food, and Community: Quantitative Data Analysis
LFS 252

Winter 2014
Lecture 9. Survey design
and sampling
L FS 252 L A N D, FOOD, AN D COMMUN I TY: QUAN T ITATIVE DATA AN ALYSIS
JA N UA RY 2 0 1 4
I N STRU C TOR: VA L E RIA C A ST EL LANOS
LFS 252  LECTURE 8, JANUARY 2014
1
Recap from previous classes
Population
Sample
S
Land, Food, and Community: Quantitative Data Analysis
LFS 252

Winter 2014
Lecture 10. Introduction
to Hypothesis Testing
L FS 252 L A N D, FOOD, AN D COMMUN I TY: QUAN T ITATIVE DATA AN ALYSIS
JA N UA RY 2 0 1 4
I N STRUC TOR: VA L E RIA C A ST EL LANOS
LFS 252  LECTURE 10, JANUARY 2014
1. Case study (Gould textbook)
Researche
Land, Food, and Community: Quantitative Data Analysis
LFS 252

Winter 2014
British Columbia
Prince Edward Island
British Columbia
Saskatchewan
Newfoundland and Labrador
British Columbia
Alberta
Ontario
Newfoundland and Labrador
Nova Scotia
Prince Edward Island
British Columbia
British Columbia
Alberta
Prince Edward Island
Britis
Land, Food, and Community: Quantitative Data Analysis
LFS 252

Winter 2014
Lecture 12. Oneproportion and Twoproportion zTest
L FS 252 L A N D, FOOD, AN D COMMUN I TY: QUAN T ITATIVE DATA AN ALYSIS
JA N UA RY 2 0 1 4
I N STRU C TOR: VA L E RIA C A ST EL LANOS
Reference: Gould, Chapter 8
LFS 252  LECTURE 12, FEBRUARY 2014
1
Imag
Land, Food, and Community: Quantitative Data Analysis
LFS 252

Winter 2014
Lecture 2. Basic graphs;
introduction to
statistical measures
LFS 252 L A N D, FOOD, AN D COMMUN I TY: QUAN T ITATIVE DATA AN ALYSIS
JA N UA RY 2 0 1 4
I N STRUC TOR: VA L E RIA CA ST EL LANOS
LFS 252  LECTURE 2, JANUARY 2014
1
Announcements
Group Activ
Land, Food, and Community: Quantitative Data Analysis
LFS 252

Winter 2014
Lecture 6. Practice:
Frequencies, Histograms,
Probability, Normal distr.
L FS 252 L A N D, FOOD, AN D COMMUN I TY: QUAN T ITATIVE DATA AN ALYSIS
JA N UA RY 2 0 1 4
I N STRU C TOR: VA L E RIA CA ST EL LANOS
LFS 252  LECTURE 6, JANUARY 2014
1
Announcements
Land, Food, and Community: Quantitative Data Analysis
LFS 252

Winter 2014
Lecture 4. Introduction
to Probability
L FS 252 L A N D, FOOD, AN D COMMUN I TY: QUAN T ITATIVE DATA AN ALYSIS
JA N UA RY 2 0 1 4
I N STRU C TOR: VA L E RIA CA ST EL LANOS
LFS 252  LECTURE 2, JANUARY 2014
Reference reading: Gould, Chapter15
1. Probabilit
Land, Food, and Community: Quantitative Data Analysis
LFS 252

Winter 2014
Lecture 9: Confidence
Intervals and Sampling
Methods
L FS 252 L A N D, FOOD, AN D COMMUN I TY: QUAN T ITATIVE DATA AN ALYSIS
JA N UA RY 2 0 1 4
I N STRU C TOR: VA L E RIA C A ST EL LANOS
LFS 252  LECTURE 9, JANUARY 2014
Recap from last class
If
we
cant
Land, Food, and Community: Quantitative Data Analysis
LFS 252

Winter 2014
Lecture 5. Introduction
to probability
distributions
L FS 252 L A N D, FOOD, AN D COMMUN I TY: QUAN T ITATIVE DATA AN ALYSIS
JA N UA RY 2 0 1 4
I N STRU C TOR: VA L E RIA C A ST EL LANOS
Reference reading: Gould, Chapter 6
LFS 252  LECTURE 5, JANUARY 201
Land, Food, and Community: Quantitative Data Analysis
LFS 252

Winter 2014
Lecture 1. Introduction;
Data
L FS 2 5 2 L A N D, FO O D, A N D CO M M U N I T Y: Q UA N T I TAT I V E DATA A N A LYS I S
JA N UA RY 2 0 1 4
I N S T R U C TO R : VA L E R I A C A S T E L L A N O S
LFS 252  LECTURE 1, JANUARY 2014
1
1. Introduction to the
Land, Food, and Community: Quantitative Data Analysis
LFS 252

Winter 2014
Measurement and Sampling Bias
Characteristics of Measurement
1. Validity
o
a valid measurement is a quantity or dimension that corresponds to the
measured variable
o
there are standard measurements (procedures and expressions) for
common variables, but wh
Land, Food, and Community: Quantitative Data Analysis
LFS 252

Winter 2014
Probability
Classical (sometimes called "A priori" or "Theoretical")
This is the perspective on probability that most people first encounter in formal education
(although they may encounter the subjective perspective in informal education).
For example, s
Land, Food, and Community: Quantitative Data Analysis
LFS 252

Winter 2014
Z Scores
The normal distribution describes a theoretical distribution of values that follow a
specific mathematical formula. Although normal distributions may have different
means and standard deviations, all normal distributions are "bellcurve" shaped,
Land, Food, and Community: Quantitative Data Analysis
LFS 252

Winter 2014
Binomial Probability Model
The binomial probability model offers a simple but very useful model. An example of
this model is the number of heads on 20 flips of a coin. This is certainly simple, but how
about: The number of people answering yes to the ques
Land, Food, and Community: Quantitative Data Analysis
LFS 252

Winter 2014
Lecture 7. Binomial
probability model
L FS 252 L A N D, FOOD, AN D COMMUN I TY: QUAN T ITATIVE DATA AN ALYSIS
JA N UA RY 2 0 1 4
I N STRU C TOR: VA L E RIA CA ST EL LANOS
LFS 252  LECTURE 7, JANUARY 2014
1
Recap from previous classes
Coin side Prob.
Head