Chapter 12: Practical Considerations Regarding Sample Surveying Flashcards
What are the elements included in the planning procedure
- purpose of the survey
- description of the population
What are the elements included in the data collection
- thoughts about the measuring procedures
- methods of obtaining/collecting data
What are the elements included in determining the sample size
- population mean
- population proportion
What are the methods used in order to collect data
- Direct measurements
- Personal interview
- Telephone interview
- Questionnaire
What are the factors influencing sample size
- Type of sample
- Accuracy of estimates
- Size of population
- Variance of measurements
- Costs and time
What is a pilot survey
A pilot survey is a small survey whereby the sample chosen should be as representative as possible to provide information about the population
- Should be a miniature imitation of the major sample survey
What are the uses of a pilot survey
- It helps to identify potential problems with data collection methods
- Used to gain information about the population before taking the sample
What three sections are questionnaires usually divided into
- Identification
- Classification
- Information of interest
What are the types of questions asked in a questionnaire
- Dichotomous questions (yes/no)
- Multiple choice
- Open ended
- Quantitative
What is the sequence of questions asked in a questionnaire
- logical, easy
- difficult, short
- long questions
What is the content of questions asked in the questionnaire
Unambiguous, simply stated, avoid leading questions
Important points to take into account for questionnaires
Confidentiality of questionnaire
Testing of questionnaire
Fieldworkers
No response
And unbiased estimator of an unknown population parameter is called efficient if
For a given sample size, it has the smallest standard error, or estimated standard error, among all other unbiased estimators
