6. Identify the sampling technique used to obtain a sample ineach of the followi

Question

6. Identify the sampling technique used to obtain a sample ineach of the following. Explain why you chose the sampling techniqueyou did for each. (10 points)
a. Patients at a local hospital are classified according to theirage. Then a random sample of 10 patients from each age group isselected.
b. The first 100 people leaving a mall are asked their preferencesfor fast food
c. A nation is divided into regions based on telephone area codes.A random sample of 10 area codes is selected.
d. Every 10th MP3 player coming off an assembly line is checked fordefects
e. Lottery winners are selected using sequences drawn from a randomnumber generator

Explanation / Answer

6. Identify the sampling technique used to obtain a sample ineach of the following. Explain why you chose the sampling techniqueyou did for each. (10 points)
a. Patients at a local hospital are classified according to theirage. Then a random sample of 10 patients from each age group isselected. STRATIFIED: THE AGE BRACKETS ARE THE STRATA
b. The first 100 people leaving a mall are asked their preferencesfor fast food CONVENIENCE: NO ATTEMPT AT RANDOMIZATION
c. A nation is divided into regions based on telephone area codes.A random sample of 10 area codes is selected. CLUSTER: EACH AREACODE IS A CLUSTER
d. Every 10th MP3 player coming off an assembly line is checked fordefects SYSTEMATIC: "every nth person..."
e. Lottery winners are selected using sequences drawn from a randomnumber generator RANDOM: should be obvious

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