1. Describe the goals of computer/network security.
Confidentialityensures that computer-related assets are accessed only by authorized
parties. That is, only those who should have access to something will actually get that
Integritymeans that a
Here are some objectives of this course:
To appreciate statistics through analyzing data.
To solve real life problems through statistics.
To learn how to use statistical software to analyze data and interpret
SAS: An Introduction
W HAT IS SAS?
It is a programming language composed of statements that specify
how data is to be processed and analyzed.
A SAS program consists of a sequence of SAS statements grouped
together into blocks, referred to as
R: An Introduction
W HAT IS R?
It is an integrated suite of software facilitates for data manipulation, calculation and graphical display. Among other things it has
An effective data handling and storage facility;
A suite of operators for c
Robust Statistics for
Location and Scale
W HY DO WE NEED R OBUST S TATISTICS ?
There may be outliers in the data.
Outliers are sample values that are considered very different from
the majority of the sample.
The data may depart f
There are two major ways of describing numerical data:
Numerical descriptive measures
Boxplot, Stem and leaf plot
Scatter plot for
SPSS: An Introduction
W HAT IS SPSS?
Statistical Package for Social Sciences.
It is an interactive user-friendly statistical package.
It comprises of two parts
Data editor creating and modifying data sets;
Statistical procedures analyzin
W HAT IS A C ATEGORICAL VARIABLE ?
Gender (Male" or Female").
Sick or well.
Success or failure.
Age group (Below 20", 20 to below 40", 40 to below 60", 60 and
Common Techniques used to an
One Sample Tests and
Two Sample Tests
O NE S AMPLE T EST FOR THE LOCATION
One sample t-test (normal populations)
Sign rank test
Testing H0 : = 0
The data set teabag.txt consists of the