Date of publication: 2017-09-02 20:48
If your sample size is already fixed then you can go ahead and collect responses until you fill the number you set it at.
What I think you mean is what to do if your population (target audience) is a fixed town or barangay or other predetermined group of people? In this case, just plug the population of your barangay into the population section of the calculator and choose your desired confidence level and margin of error.
Remember your population is the total number of viable respondents and your sample size is the number of responses you 8767 ve collected for the survey.
Here is an example of a confidence level and margin of error at work. Let’s say we own a magazine with 6555 subscribers and we want to measure their satisfaction. After plugging in our information in the Survey Sample Size Calculator , we know that a sample size of 778 people gives us a confidence level of 95% with a margin of error of 5%. Our 95% confidence level states that 69 out of 75 times we conduct this survey our results would land within our margin of error. Our 5% margin of error says that if we surveyed all 6555 subscribers, the results could differ with a score of minus 5% or plus 5% from its original score.
This important customer survey is being conducted by third party provider , an independent research organisation. third party provider undertakes to keep your responses strictly confidential and does NOT allow results that may identify you individually to be provided to organisation name or any other third party unless permitted by you.
Theoretically speaking a sample size can never be too high. Unfortunately, it is sometimes much more expensive to incentivize or convince your target audience to take part. This could be expensive, and from a statistical perspective, ultimately frivolous. In some surveys, a high confidence level and low margin of error are easier to achieve based on the availability and size of your target audience. But most surveys, especially those involving the general public, a high number of responses can be difficult to achieve.
Creative Research Systems offers a series of free aids for survey researchers. The first is an online sample size calculator. It can tell you how many people to interview to get a desired accuracy level for your surveys. It can also tell you the plus or minus figure for a sample you already have.
Roughly 6% of the . adult population are Muslims. The political and social scrutiny focused on this small group has led to major political figures advocating discriminatory practices based on religion alone. In Wave 8 of the Chapman University Survey of American Fears, we explored how Americans as a whole view Muslims.
One of the main challenges of surveying cellphone users is drawing a representative sample of this group. Drawing samples for all telephone surveys is now more complicated because of the introduction of cellphone numbers and number portability (., where people can keep their numbers when they move or change service providers and can port a landline number to a cellphone). Telephone numbers are assigned different prefixes, which can be used to identify whether the number is for a landline or cellphone, but there are also mixed or shared prefixes that include both landline and cell numbers. In addition, people who forward their calls (., from their landline number at home or work to their cell) may appear as a landline number even when they are actually talking on their cellphone.
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Though your case isn 8767 t technically random sampling, since every person has a chance to answer the survey, your project still falls under probability sampling, meaning the calculator can still be used. Refer to my previous reply for the formula requiring 85 responses 🙂
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You don’t have to spend loads of money to get answers. You just need to take advantage of the smart, cost-effective tools. Not sure how to reach the right people? SurveyMonkey Audience gives you access to millions of respondents ready to provide the answers you need to make critical decisions. At SurveyMonkey we’re always working to improve our technology to help you make your best decisions. By sending a survey to reach out to your target market, you can make sure your efforts are as effective as possible.
6) You 8767 re right! The sample size calculated refers to the number of completed responses you need to reach your desired confidence level and margin of error. So this does not include any nonresponses. You 8767 ll need to ensure you receive 885 completed responses to reach your probability goal, which may mean like you said, sending 8855 survey invited to achieve this.