As a public polling company, Ringside Research understands the importance of obtaining accurate and reliable survey results. One of the key factors that contribute to the accuracy of our surveys is our sampling method – Probability Proportionate to Size (PPS) sampling. In this blog, we’ll delve into what PPS is, why it’s so important in the context of our surveys, and provide several examples to illustrate its effectiveness.
PPS is a statistical sampling method that is used to select a sample of elements from a population in such a way that each element has a known, non-zero probability of being selected. In other words, it’s a method of randomly selecting participants from a population in a way that ensures that each person has an equal chance of being selected.
One of the key advantages of PPS is that it helps to ensure that the sample is representative of the population as a whole. In India, where there is a lot of diversity in terms of gender, age, caste, race, economic conditions, occupation, language, and geography (Rural-urban, Irrigated-Dry Land etc), this is especially important. By using PPS, we can ensure that our sample accurately reflects the demographics of the population, which in turn helps us to obtain accurate and reliable results.
For example, let’s say we are conducting a survey on consumer spending habits in India. By using PPS, we can ensure that our sample accurately reflects the age, gender, and income distribution of the population. This means that if, for example, 50% of the population is female, 50% of our sample will also be female. Similarly, if 30% of the population is aged 18-25, 30% of our sample will also be in that age group.
Another advantage of PPS is that it allows us to take into account the size of the population in each subgroup. For example, if we are conducting a survey in India, we may have more participants from urban areas than from rural areas. By using PPS, we can adjust for this by giving more weight to the participants from rural areas, which helps to ensure that the sample is representative of the population as a whole.
For instance, if 70% of the population lives in urban areas and 30% lives in rural areas, our sample would reflect this distribution. This means that 70% of our sample would be from urban areas and 30% would be from rural areas. This is important because it helps us to accurately capture the opinions and experiences of people from both urban and rural areas, which is crucial in a diverse country like India.
In conclusion, Ringside Research’s use of PPS sampling is a key factor in our ability to provide accurate and reliable survey results. By ensuring that our sample is representative of the population and taking into account the size of the population in each subgroup, we can provide our clients with the information they need to make informed decisions. Whether it’s a survey on consumer spending habits, political opinions, or any other topic, Ringside Research’s use of PPS sampling ensures that our results accurately reflect the opinions and experiences of the population as a whole.