Basic Statistic 1

INTRODUCTION

Statistic, is a method of making your research data viable, for us researchers. But, it also can make vice versa. That's the beauty and ugly side of statistics. (Hypothesis Test) We'll get on to that later, but here's some definition, before we start:

STATISTICS
defined as the science of planning, conducting, summarizing, analyzing, intrepreting and making conclusion based on the availabale data.

there are 2 areas of statistics:


DESCRIPTIVE STATISTICS
Basically collecting, organizing, summarizing and presenting data. Doesn't need to think too much. just crunch the numbers into formula.

INFERENTIAL STATISTICS
Estimating, hypothesis testing, studying the relationship among variables and making calculated probability. Major Headache for everyone.

Within these 2 area, there are term commonly used throught out the statistics world. these are the definitions:

POPULATION
Collection of all subjects in the study. if your studying about cows colour in Z farm, the population is all the cow in the farm, regardless of colour.

SAMPLE
A subgroup of subjects selected from a population. Taking previous example; white cows group is a sample from the population of cows in Z farm.

DATA
the values such as measurements, observations that have been collected. there are 23 white cows, 13 brown cows and 14 black cows. (example)

These are the basic terms in statistics. Next post will be on Variables.


Sources

Abbas F.M. & Low H.C., 2012. Elementary Statistics for Technologist. Penerbit Universiti Sains Malaysia . Pulau Pinang.

Base unit 3

SI-Derived Units Expressed by means of Special Names

Base Unit 1

Base Unit 2
pdf version

Quantity	SI Unit		Expression in terms of SI base Units
	Name	Symbol
Dynamic Viscosity	Pascal second	Pa s	m-1 kg s-1
Moment of Force	Newton meter	N m	m2 kg s-2
Surface Tension	Newton per meter	N/m	Kg s-2
Power Density, Heat flux density, irradiance	Watt per square meter	W/m2	Kg s-3
Heat capacity, Entropy	Joule per kelvin	J/K	m2 kg s-2 K-1
Specific Heat Capacity	Joule per kilogram kelvin	J/(Kg K)	m2 s-2 K-1
Specific energy	Joule per kilogram	J/kg	m2s-2
Thermal Conductivity	Watt per meter Kelvin	W/(m K)	m kg s-3 K-1
Energy Density	Joule per cubic meter	J/m3	m-1 kg s-2
Electric Field Strength	Volt per meter	V/m	m kg s-3 A-1
Electric Charge Density	Coulomb per cubic meter	C/m3	m-3  s A
Electric flux density	Coulomb per square meter	C/m2	m-2  s A

Base Unit 2

SI-Derived Units with special Names

^{Base unit 1}

 ^{Base unit 3 
pdf version} 

quantity	SI unit			Expression (SI units)
	name	Symbol	Expression (other units)
Frequency	Hertz	Hz		s-1
Force	Newton	N		m kg s-2
Pressure, Stress	Pascal	Pa	N/m2	m-2 kg s-2
Energy, Work, Quantity of Heat	Joule	J	Nm	m2 kg s-2
Power, Radiant Flux	Watt	W	J/s	m2 kg s-3
Quantity of Electricty, Electric Charge	Coulomb	C		S A
Electric Potential, Electromotive Force, Potential difference	Volt	V	W/A	m2 kg s-3 A-1
Capacitance	Farad	F	C/V	m-2 kg-1 s4 A2
Electric Resistance	Ohm	Ω	V/A	m2 kg s-3 A-2
Conductance	Siemens	S	A/V	m-2kg-1s3A2
Celsius Temperature	Degree Celsius	°C		K
Luminous Flux	Lumen	Lm		Cd sr
Illuminance	lux	lx	Lm/m2	m-2 cd sr