Sampling

Question 1

Systematic sampling

Answer 1

Sampling is at a set interval from the initial point which is chosen at random

Question 2

Areal sampling

Answer 2

Where the unit of sampling is pre-defined (quadrat)

Question 3

Linear sampling

Answer 3

Where sampling is along a line (transect)

Question 4

Point sampling

Answer 4

Where separate points or individuals are chosen as the sampling unit

Question 5

Pragmatic sampling

Answer 5

Sampling in which the samples are chosen from those that are easily and safely available

Question 6

Random sampling

Answer 6

Where all the elements of data have an equal chance of being selected

Question 7

Stratified sampling

Answer 7

Method in which the sampling of data is proportional to the whole size

Question 8

Methods of sampling: Sample points are selected randomly

Answer 8

It is statistically sound but easy to miss something and the same place could be picked more than once

Question 9

Methods of sampling: Stratified sampling

Answer 9

Takes into account underlying patterns and ensures that all are sampled - no significant aspect is missed but it is biased and invalid

Question 10

Methods of sampling: Systematic sampling

Answer 10

Items are selected at regular intervals - it is quick and easy but invalid

Question 11

Methods of sampling: Pragmatic sampling

Answer 11

Samples where you can get access (not on cliff edge etc) - safe and realistic but invalid