sampling methods

Question 1

QUOTA SAMPLING

Answer 1

• non random, researcher selects based on characteristics
  ✅cheap, quick, no sampling frame
  ❌representative

Question 2

OPPORTUNITY SAMPLING

Answer 2

• most available people e.g people walking by
  ✅easy, quicker
  ❌biased e.g people walking by at noon are unemployed

Question 3

RANDOM SAMPLING

Answer 3

• names out of generator
  ✅unbiased, equal opportunity
  ❌time consuming to make list of names

Question 4

SNOWBALL SAMPLING

Answer 4

• current p’s recruit more
  ✅access hard to reach groups
  ❌not good cross section as friends of friends

Question 5

SELF SELECTED SAMPLING

Answer 5

• ads online / news paper, volunteers
  ✅access to wider society = more representative and less bias
  ❌volunteer bias

Question 6

STRATIFIED SAMPLING

Answer 6

• subdivide sample into smaller groups + randomly select
  ✅representative, unbiased
  ❌time consuming to form subgroups

Question 7

SYSTEMATIC SAMPLING

Answer 7

• predetermined system to select p’s e.g every nth person
  ✅unbiased
  ❌unrepresentative as people selected are similar

Question 8

PURPOSIVE

Answer 8

• researchers find people who suit characteristics
  ✅ more time and money
  ❌unrepresentative