16/3/2016
Chapter 3
Numerical Descriptive Measures of
Data
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3.1 Ungrouped Data
(a) Mean (Arithmetic Mean)
o Mean is the most commonly used measure of
central tendency. It is the average of a group of
data. Mean is calculated by summi
8/5/2016
The Rules of Probability
Chapter 6
Probability (Part 2)
(page 259)
Event and Sample Space
Sample space, S is the possible outcomes of an
experiment.
If we toss a coin, the possible outcomes are either
head (H) or tail (T), so the sample space i
23/3/2016
Chapter 3
Part 2 (Grouped Data)
Numerical Descriptive Measures of
Data
bmath1201.blogspot.com
(b) Median
(a) Mean
Mean =
Where
When the amount of raw data is large, it is better
presented in a table of frequency distribution.
Computing measures
23/2/2016
2.1 Ungrouped and Grouped Data
Chapter 2
Charts and Graph
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Raw data, or data that have not been summarized in
any way, are sometimes referred to as ungrouped data.
Table 2.1 contains 60 years of raw data of the
unemployme
25/4/2016
Chapter 5
Index Number
(Page 219)
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The Consumer Price Index measures the
changes in the price of consumer goods.
It is very important because any increase in this
index reflects the increase in living expenses
and the cost
8/5/2016
Introduction
Chapter 6
Probability (Part 1)
(page 254)
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Three different conceptual approaches to probability.
1. The classic approach, where the probability is
computed by finding the ratio of the number of
possible outcomes
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Meaning of statistics
As a science dealing with the collection, analysis,
interpretation, and presentation of numerical
data. (Webster s Third New International)
Chapter 1
Introduction to Statistics
Population: A collection of persons, objects,
19/4/2016
Chapter 4
Correlation and
Regression
(Page 153)
From the above examples we can conclude two
things. First, when an increase in one variable causes
another variable to increase, these two variables are
said to have a positive linear relationship