Section 1 - Data collection and sampling Flashcards
What is data collection?
The process of gathering information for analysis.
True or False: Sampling is the same as data collection.
False
What is a sample?
A subset of a population used to represent the whole.
Fill in the blank: The two main types of data are ______ and ______.
qualitative, quantitative
What is qualitative data?
Data that describes characteristics or qualities.
What is quantitative data?
Data that can be measured and expressed numerically.
Multiple Choice: Which of the following is an example of qualitative data? A) Height B) Color C) Age
B) Color
What is a population in statistics?
The entire group of individuals or items that is being studied.
True or False: A convenience sample is a type of random sampling.
False
What is random sampling?
A sampling method where each member of the population has an equal chance of being selected.
Fill in the blank: A ______ sample is chosen based on specific characteristics.
stratified
What is bias in data collection?
A systematic error that leads to incorrect conclusions.
Multiple Choice: Which sampling method involves selecting every nth member of a population? A) Random B) Systematic C) Convenience
B) Systematic
What is an observational study?
A study where researchers observe subjects without interference.
True or False: Surveys are a method of data collection.
True
What does ‘data validity’ refer to?
The accuracy and truthfulness of data collected.
Fill in the blank: ______ data can be categorized into different groups.
Qualitative
What is a survey?
A method of gathering information from individuals, often through questionnaires.
Multiple Choice: Which type of data is age considered? A) Qualitative B) Quantitative C) Neither
B) Quantitative
What is a cross-sectional study?
A study that analyzes data from a population at a specific point in time.
