Edexcel AS Level Maths Statistics chapter 1

Edexcel AS Level Maths Statistics chapter 1

POPULATION - ANSWER-THE WHOLE SET OF ITEMS THAT ARE OF INTEREST

CENSUS - ANSWER-OBSERVES OR MEASURES EVERY MEMBER OF A POPULATION

ADVANTAGES OF A CENSUS - ANSWER-IT SHOULD GIVE A COMPLETELY ACCURATE RESULT

DISADVANTAGE OF A CENSUS - ANSWER-TIME CONSUMING AND EXPENSIVE
HARD TO PROCESS LARGE QUANTITY OF DATA

SAMPLE - ANSWER-A SELECTION OF OBSERVATIONS TAKEN FROM A SUBSET OF THE POPULATION
WHICH IS USED TO FIND OUT INFORMATION ABOUT THE POPULATION AS A WHOLE

ADVANTAGES OF A SAMPLE - ANSWER-LESS TIME CONSUMING
FEWER PEOPLE HAVE TO RESPOND
LESS DATA THAN A CENSUS

DISADVANTAGE OF A SAMPLE - ANSWER-THE DATA MAY NOT BE AS ACCURATE
THE DATA MAY NOT BE LARGE ENOUGH TOGGLE INFORMATION ABOUT THE POPULATION

SAMPLING UNITS - ANSWER-INDIVIDUAL UNITS OF A POPULATION

SAMPLING FRAME - ANSWER-A LIST OF INDIVIDUALLY NAMED OR NUMBERED SAMPLING UNITS

SIMPLE RANDOM SAMPLE - ANSWER-A SAMPLE WHERE EVERY SAMPLING UNIT HAS AN EQUAL CHANCE
OF BEING CHOSEN

ADVANTAGES OF SIMPLE RANDOM SAMPLE - ANSWER-FREE OF BIAS
EASY AND CHEAP TO IMPLEMENT
EACH SAMPLING UNIT HAS EQUAL CHANCE OF SELECTION

DISADVANTAGE OF SIMPLE RANDOM SAMPLE - ANSWER-A SAMPLING FRAME IS NEEDED
NOT SUITABLE WHEN THE POPULATION SIZE IS VERY BIG

SYSTEMATIC SAMPLING - ANSWER-A METHOD OF SAMPLING WHERE THE REQUIRED ELEMENTS ARE
CHOSEN AT REGULAR INTERVALS FROM AN ORDERED LIST

ADVANTAGES OF SYSTEMATIC SAMPLING - ANSWER-SIMPLE AND QUICK TO USE
SUITABLE FOR LARGE SAMPLES

DISADVANTAGES OF SYSTEMATIC SAMPLING - ANSWER-A SAMPLING FRAME IS NEEDED
IT CAN INTRODUCE BIAS IF SAMPLING FRAME IS NOT RANDOM