Each month, the census bureau mails survey forms to 250,000 households asking qu

Question

Each month, the census bureau mails survey forms to 250,000 households asking questions about the people living in the household and about such things as motor vehicles and housing costs. Telephone calls are made to households that don't return the form. In one month, responses were obtained from 240,000 of the households contacted. The population of interest is the residents in the suburb that support a new recreation center. the 250,000 households contacted. only U.S. households with phones. all U.S. households. A student organization wanted to study voting preferences in its student body during the 2012 presidential election. They selected 120 students at random from each class, freshmen through seniors. The sampling technique being used is simple random sampling. stratified random sampling. volunteer sampling. multistage sampling.

Explanation / Answer

2) all US households ; as survey is being done to create a estimate of population parameter

3)stratified random sampling

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