Page 4 - Basic Statistics

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CONTENTS

PREFACE i

CONTENTS ii

CHAPTER 1
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PRESENTATION OF DATA WITH TABLE AND CHART 1

1.1 Describing data with frequency table 2
1.2 Histogram and frequency polygon 5
1.3 Stem and leaf diagrams 8
1.4 Boxplot diagrams 10
Worked exercises sheets 13

CHAPTER 2
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NUMERICAL MEASURES TO SUMMARIZE DATA 18

2.1 Measure of central location 19
2.1.1 Measure of central location for ungroup data 19
a. Arithmetic Mean 19
b. Median 20
c. Mode 21
2.1.2 Measures of central location for grouped data 22
2.2 Dispersion of data 24
2.2.1 Dispersion of ungroup data 24
a. Range 24
b. Modified Ranges 24
c. Variance 25
d. Standard Deviation 26
2.2.2 Dispersion of grouped data 28
Worked exercises sheets 31

CHAPTER 3
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NORMAL PROBABILITY DIRTRIBUTION 39

3.1 Normal curve 40
3.2 Area under the normal curve 41
3.3 Standard normal distribution Z 43
3.4 Using the standard normal distribution table 44