Sampling

Question 1

Simple Random

Answer 1

Everyone in the population has an equal chance to be chosen

Question 2

Voluntary

Answer 2

People chosen themselves to be elected by responding to general appeal

Question 2

Stratified

Answer 2

Divide the target pop. into subcategories and select people in the proportion that they occur

Question 3

Opportunity

Answer 3

Selecting people that are available at the time

Question 4

Coverage Error

Answer 4

People who don’t belong in study are mistakenly included

Question 5

Statistical Inference

Answer 5

Forming judgement on a population based on a small group of people (simple random sampling)

Question 6

Parameter

Answer 6

Number that describes the pop.

Question 7

Statistic

Answer 7

Number that describes a sample

Question 8

Sample Variability

Answer 8

Variation in the rank of a statistic in repeated random sampling

Question 9

Sampling Distribution

Answer 9

Distribution of values taken by statistic in all possible samples of the same size from the same pop.

Question 10

Variability of a Statistic

Answer 10

Spread of sampling distribution

Question 11

Bias

Answer 11

Where the centre of the sampling distribution bell curve lies