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191-B2-1
Random Sampling
1. Decide whether the survey used a random sampling or not.
Example a. From all the students at Ann’s
school, 50 students were randomly
30 randomly selected male students selected and were asked about their
at Ryan’s school were asked about favorite lunch menu.
their favorite PC game.
b. People who were passing by the c. An expert was asked about the
city park were asked about the satisfaction level of Washington
satisfaction level of the region’s city’s air purity.
cultural facilities.
Random Sampling
1. Decide whether the survey used a random sampling or not.
Example a. From all the students at Ann’s
school, 50 students were randomly
30 randomly selected male students selected and were asked about their
at Ryan’s school were asked about favorite lunch menu.
their favorite PC game.
b. People who were passing by the c. An expert was asked about the
city park were asked about the satisfaction level of Washington
satisfaction level of the region’s city’s air purity.
cultural facilities.
