Quantitative Research

INTRODUCTION
Quantitative research involves systematically collecting and analyzing data through statistical techniques to predict future trends or make adjustments. It typically uses surveys, online polls, and questionnaires to gather information from current and potential customers. An example is a survey to measure patient satisfaction regarding doctor wait times.

INSIGHTS
Quantitative research helps identify patterns, make predictions, test causal relationships, and generalize findings to larger populations.

TECHNIQUES AND TYPES OF STUDIES

1. Survey Research: The most fundamental method where data is collected through surveys, such as online polls and questionnaires. It can be cross-sectional (data at one point in time) or longitudinal (data collected over a period). Cross-sectional surveys assess variables at a specific moment, while longitudinal surveys track changes over time.
2. Correlational Research: Aimed at understanding relationships between two or more variables, such as the impact of stress on depression. Correlation does not prove causation.
3. Causal-Comparative Research: Focuses on comparing variables to understand cause-and-effect relationships, often without manipulating variables.
4. Experimental Research: Involves testing hypotheses through controlled experiments, typically used in natural sciences.

DATA COLLECTION METHODOLOGIES

1. Sampling Methods:
   Probability Sampling: Random selection ensures every member of a population has an equal chance of being chosen. Types include simple random, stratified random, cluster, and systematic sampling.
   Non-Probability Sampling: Researcher’s judgment is used to select samples, which might not represent the whole population. Types include convenience, consecutive, quota, snowball, and judgmental sampling.
2. Surveys & Polls:
   Surveys are designed with nominal, ordinal, interval, and ratio scales to collect data using close-ended questions (e.g., multiple-choice).
   Surveys can be distributed through email, social media, embedded on websites, or via QR codes, with email being the most effective method.