Identify which of these types of sampling is used: cluster, convenience, simple

Question

Identify which of these types of sampling is used: cluster, convenience, simple random, systematic, or stratified. Justify for full credit . (a) A STAT 200 professor wants to estimate the study hours of his students. He teaches two sections, and plans on randomly selecting 1 0 students from the first section and 1 5 students from the second section. (b) A STAT 200 student is interested in the number of credit cards o w n e d b y college student s . She surveyed all of her classmates to collect sample data . (c) The quality control department of a semiconductor manufacturing company tests every 100 th product from the assembly line. (d) On the day of the last presi dential election, UMUC News Club organized an exit poll in which specific polling stations were randomly selected and all voters were surveyed as they left th ose poll ing station s .

Explanation / Answer

(a) A STAT 200 professor wants to estimate the study hours of his students. He teaches two sections, and plans on randomly selecting 1 0 students from the first section and 1 5 students from the second section.

CONVENIENCE SAMPLING

(b) A STAT 200 student is interested in the number of credit cards o w n e d b y college student s . She surveyed all of her classmates to collect sample data .

SIMPLE RANDOM

(c) The quality control department of a semiconductor manufacturing company tests every 100 th product from the assembly line.

SYSTEMATIC

d) On the day of the last presi dential election, UMUC News Club organized an exit poll in which specific polling stations were randomly selected and all voters were surveyed as they left th ose poll ing station s .

CONVENIEINCE SAMPLING

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