According to our research of Iowa and other state lists there were 58 registered sex offenders living in 50701 zip code as of April 10, 2017. The ratio of number of residents in zip code 50701 to the number of sex offenders is 496 to 1.
Customer survey questionnaires heavily depend on demographic questions. If your questionnaire results tell you that 65% of your respondents are Males in the 25 to 39 age group, your advertising would focus on that age and gender group as they would make up a large portion of your customer base. Your categories need to be broken up into divisions that make sense for your research.
Census vs. Sampling. Surveys can gather information through different methods of observation. However, most surveys employ a questionnaire to measure specific characteristics of the population. There are two main ways to gather this information. A census survey collects complete information from all participants in the population. General criteria of a census survey include: 1  Establish and maintain a complete list of the primary sampling unit (PSU) components. 2  All members of the PSU in the fishery must be included. 3  Validation (used to correct for missing and misreported data)  Enforceable and enforced.