Collection of Data Test - 23

Increasing the sample size can indeed help improve the representativeness of a sample by reducing sampling variability and increasing the likelihood that the sample reflects the characteristics of the population. As the sample size increases, the distribution of sample statistics (such as means or proportions) tends to converge toward the population parameters, as predicted by the central limit theorem. This means that larger samples are more likely to yield sample statistics that are closer to the true population parameters.

Unpublished data refers to data that has been collected but has not been made publicly available through publication. This data may be held by research institutions, scholars, trade associations, or other organizations for various reasons, such as ongoing research projects, proprietary concerns, or data that has not yet undergone analysis or review for publication.

The statement of objectives outlines the goals and aims of the research study, providing a clear direction for the research process. Once the objectives are established, researchers can then proceed to formulate hypotheses that address the research questions derived from these objectives. Therefore, the correct answer is the statement of objectives.

Sample survey method involves selecting a subset or sample of the population and collecting data from them to make inferences or generalizations about the entire population. This method is used when it's not feasible or practical to collect data from every individual or unit in the population, making it a more efficient and cost-effective approach to data collection and analysis.

Primary data refers to data collected directly from original sources through methods such as surveys, experiments, observations, or interviews. A census report involves the direct collection of data from every individual or unit in a population, providing firsthand information about various demographic, social, and economic characteristics of the population. Therefore, a census report represents a prime example of primary data.

Census of population and national income estimates typically involve the direct collection of data from individuals, households, businesses, and other entities within the population. This data collection is conducted by government agencies through surveys, interviews, and administrative records. Since the data is collected firsthand for the specific purpose of the census or national income estimates, it falls under the category of primary data.

Market research firms often rely on secondary data sources such as government databases, industry reports, and published research to complement their own primary data collection efforts. Secondary data provides valuable context, background information, and insights into market trends, consumer behavior, and industry dynamics, which can inform the design of primary research studies and help validate findings.

An enumerator is an individual responsible for gathering data directly from respondents during surveys or censuses. They administer questionnaires, conduct interviews, or perform other data collection methods as part of their role in collecting accurate and reliable information.

Lottery sampling is a method of random sampling where each member of the population has an equal chance of being selected. It involves assigning a unique number to each element of the population and then drawing numbers randomly to select the sample. This method ensures that every individual in the population has an equal opportunity to be included in the sample, making it a form of random sampling.

Experiments involve manipulating variables to observe the effects on other variables and are primarily used to establish cause-and-effect relationships. While experiments can be a part of the research process, they are not typically considered as a method of data collection in the same sense as questionnaire, interviews, and observations. Instead, experiments are more focused on testing hypotheses and theories.