Identify which sampling technique (random, stratified, cluster, convenience) was

Question

Identify which sampling technique (random, stratified, cluster, convenience) was used.

a) calling randomly generated telephone numbers a study asked 1050 US adults which medical conditions could be presented by their diet.

b)a student asks 22 friends to participate in psychology experiment

c)a pregnancy study in kobe, Malaysia randomly selected 38 communities from the kobe metropolitan area then interviewed all available pregnant women in these communities

d) law enforcement officials stop and check the driver of every fourth vehicle for blood alcohol content

e)twenty five students are randomly selected from each grade level at a high school and surveyed about their studs habits

f)a journalist interviews 154 people waiting at an airport baggage claim and asks them how safe they feel during air travel

Explanation / Answer

a) calling randomly generated telephone numbers a study asked 1050 US adults which medical conditions could be presented by their diet.

b)a student asks 22 friends to participate in psychology experiment

c)a pregnancy study in kobe, Malaysia randomly selected 38 communities from the kobe metropolitan area then interviewed all available pregnant women in these communities

d) law enforcement officials stop and check the driver of every fourth vehicle for blood alcohol content

e)twenty five students are randomly selected from each grade level at a high school and surveyed about their studs habits

f)a journalist interviews 154 people waiting at an airport baggage claim and asks them how safe they feel during air travel

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