6.1. Surveys and Sampling http://www.ck12.org
- Stratification. It could be that people who ride at different times during the day have different opinions about
thrill rides or are from different age groups. In this case, each hour is a stratum. For example, it could be that
those riding early in the morning are more of the thrill seeker types, and the more hesitant folks might take
some time to muster the courage to ride. - To make it easier to keep track of repeated choices, we have generated 100 numbers and stored them inL1.
The chosen students are:16 , 20 , 9 , 31 , 30 , 29 , 8 , 10 , 23 , 33In this example there were no repeated digits.References