One data collection technique is simple random sampling. This is the most simple survey done, as it is non-discriminatory towards those parties selected to participate in surveys.
There are many ways to collect data we can use direct observation, interviews, surveys, questionnaires and experiments. Direct Observation and observational studies are data obtained from individuals but we do not try to influence how they answer in any form or fashion. In experiments we try to force an individual or a group to see the affects of the experiment and then make a choice. Interviews help in the area of no responsiveness to questionnaires and censuses. The quest with interviews becomes whether or not the person is telling the truth when answering the interviewer. A good interviewer will make a person feel good about giving truthful answers. Questionnaires and censuses ask individuals to answer questions, which will list certain characteristics of themselves. A survey can be put together in many forms, mostly done by using questions. Most will try to sample were there is no influence and may possibly be used as an observational study. Then there are many that are not designed to be balanced and lead to favorable responses because they are misleading. (Sullivan, 2004) From Latin ex- + -periri (akin to periculum attempt). ... interview An interview is a conversation between two or more people where questions are asked to obtain information about the interviewee. ... A questionnaire is a type of survey handed out in paper form usually to a specific demographic to gather information in order to provider better service or goods. ... A census is the process of obtaining information about every member of a population (not necessarily a human population). ... There are several uses of the word survey: // Kinds of surveys Statistical surveys are used in marketing and polling research. ...
Sullivan, M. (2004) Statistics, Informed Decisions Using Data. Upper Saddle River NJ: Pearson Education, Inc.
In contrast, mathematical statistics (or simply statistical theory) is the subdiscipline of applied mathematics which uses probability theory and analysis to place statisticalpractice on a firm theoretical basis.
As a practical matter, although statistics is taught in university departments as diverse as psychology, education, public health, and many others, it is most strongly associated with mathematics departments, as typically only the largest schools will afford statisticians a separate department.
A common goal for a statistical research project is to investigate causality, and in particular to draw a conclusion on the effect of changes in the values of predictors or independent variables on a response or dependent variable.
All professional users of statistical methods should urge clients, employers, researchers, policy makers, journalists, and the public to expect statisticalpractice to be in accordance with these guidelines and to object when that is not the case.
Statistical practitioners have ethical obligations to keep methodology publicly available for the benefit of society at large; proprietary reservation of socially useful statistical methodology for private profit, if justified at all, should be as limited as possible in time and scope.
Statistical practitioners should not be included in authorship or in acknowledgment regarding projects or publications without their explicit permission.
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