Chapter 3
Sampling and
Sampling Techniques
Complete Enumeration versus Sampling
In complete enumeration or a
census, we measure the variable/s of
interest from all the elements of the
population.
In sampling, we measure the
variable/s of interest from the
Chapter 12
Index Numbers
Definition of Index Numbers
Definition: An index number is a summary measure designed to
show changes in the value of a variable (or more
commonly, a group of related variables taken as whole)
over a period of time, or geographic
STATISTICS 114
Third Exam (SAMPLE EXAM)
I. DEFINITION OF TERMS. Express the definitional formula of the following concepts in terms of
the following notations Population Data=cfw_X1, X2, , XN, Sample Data=cfw_X1, X2, ., Xn and
Sample Array=cfw_X(1), X(2),
STATISTICS 114
SAMPLE FOURTH EXAM
TGCapistrano
I. FILL IN THE BLANKS.
1. The distribution of the data set with the following boxplot
is skewed to the _.
2. In a stem-and-leaf display, if the unit=10 then 3 | 41 represents the value _.
3. Methods used in e
Chapter 1
Introduction
Definition of Statistics (page 3)
Definition 1.1.
Statistics is the branch of science that deals
with the collection, organization, analysis,
interpretation and presentation of data.
Chapter 1. Introduction
1
Definition of Statistic
Chapter 10
Exploratory Data Analysis
Definition of
Exploratory Data Analysis (page 410)
Definition 12.1.
Exploratory data analysis (EDA) is a subfield of applied
statistics that is concerned with the investigation of the
collected or transformed data to r
Chapter 9
Measures of Skewness
And Kurtosis
Symmetric vs Skewed Distribution
(page 260)
Definition 9.1
If it is possible to divide the histogram at the center into two
identical halves, wherein each half is a mirror image of the
other, then it is called a
Chapter 8
Measures of Dispersion
Definition of
Measures of Dispersion (page 231)
A measure of dispersion is a descriptive summary measure
that helps us characterize the data set in terms of how varied
the observations are from each other.
A small value in
Chapter 6
Measures of Central
Tendency
Definition of a Summary Measure
(page 185)
A summary measure is a single value
that we compute from a collection of
measurements in order to describe one
of the collections particular
characteristics.
Chapter 6. Meas
Chapter 7
Measures of Location
Definition of
Measures of Location (page 219)
A measure of location provides information
on the percentage of observations in the
collection whose values are less than or equal
to it. It indicates the relative position of an
Chapter 4
Presentation of Data
Methods of Data Presentation
Textual presentation (page 117): incorporates
important figures in a paragraph of text
Tabular presentation (page 120): arranges figures
in a systematic manner in rows and columns
Graphical prese
Chapter 5
Organization of Data
Definition of Raw Data (page 164)
Definition 5.1.
Raw data are data in their original form.
* Raw data have not been organized in any
manner and observations are recorded in
the order observed.
Chapter 5. Organization of Dat
Chapter 2
Collection of Data
Definition of Measurement (page 21)
Definition 2.1.
Measurement is the process of determining
the value or label of the variable based on
what has been observed.
Chapter 2. Collection of Data
1
Example (page 21)
Variable: Educ
Section 6.1
Summation
The Summation Notation (page 186)
n
X X X
i
1
2
. Xn
i 1
where (capital Greek letter sigma) is the summation notation
X i is the value of the variable for the ith observation
(the expression to the right of is the term of the summat
Chapter 11
Ratios
Definition of Ratios
The ratio of a number x to another number y expresses the
size of one measure x with respect to the size of another
measure y. It is written as x:y and is read as x is to y.
Example:
165 Freshmen
134 Sophomores
97 Ju