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Larger surveys allow for a greater deviance in the actual population. ), 2)the period over which I should be conducting the study (should I choose one day per week and question all patients coming into the department during that day say for a month, or 2; or maybe 2 days a week on a period of 1 month etc.) On the other hand, if 45% answer "Yes" and 55% answer "No," there is a greater chance of error. Hi I’m Yeshey, I have population 277 and what will be my sample size? I am just wondering how the calculator resulted to a 384 sample size. A representative sample size doesn’t guarantee a representative sample in general. I am working on a change project (small scale) for the completion of my BSN in May. With the CheckMarket sample size calculator you can calculate your error margin for various confidence levels. So we will need to sample at least 186 (rounded up) randomly selected households. i also choose 95% as my level of confidence and 5% as marginal error is this right or what do you think sir? My population is 310, and when entered into your calculator (error 5%, CL 95%), the required number of respondents (172) seems high. You must try to spread your population evenly over all colleges in the district. Would it be sufficient for me to proceed the data analysis with only 183 respondents Sir? However, you could say that X% of the retail store customers you surveyed are satisfied with the service. If you only want to draw conclusions about your staff (37 people), your sample size is definitely valid. I don’t know what should I do because I really suffered just to get this response rate! i tried using your SSadjusted = (SS) / 1 + [(SS – 1) / population] formula to adjust the SS based on the population but it still registers about 385… may i request some help on this? Alternatively, you could look for earlier scientific work on political surveys in India and see which criteria they used. 1. Hope this helps! i have to conduct my survey but i am so stuck. E.g if the total number of ministries are 36, would you design just one questionnaire for each ministry? Glad to hear I was able to help you! Hi, I need to draw sample (minimum Household that I need to survey) from a list of 140 households. ii. The margin of error is derived from following formula: I am currently working on an assignment and to be quite honest with you its a bit confusing.This is the scenario. Remember that your population consist of approximately 400 million adults in the EU. Fill in your population and sample size with a confidence level of choice (often 95%) and your margin of error will be calculated automatically. The sample size calculator determined that I would need 353 respondents – but does that even apply in this case? You will also want to check whether your sample is representative for the total population (e.g. Often confidence level 95% is taken and MoE 5%. of samples possible if the population is 10 and size of sample to be taken is 3. You can check with our sample size calculator, I would greatly appreciate your assistance and response to my question, I am running three trials to compare a different processes used in each, I am trialling ​8​ stores for each process being tested​ ​ Baseline data : 8​ weeks Transition: 4 weeks (to get used to the new process / equipment) Pilot: ​8 weeks. With a margin of error of 1%, you would have to survey 131 respondents. How small can I break down each group. The population is 475. I think you should treat each section as a separate population. If you do qualitative research as you state (e.g. In the example, the population is the size of the high school being studied, so 250 people. Sir, How can you estimate the magnitude and proportion of the respondents, just for example: total number of households is 59032 magnitude is 17056 and proportion is 28.89 … what could be the possible answer? If you want to write conclusions for each type of work position separately, you need to count population per working position. In that way you would only need 3 * 384 = 1152 respondents. (95% level of confidence) advance thanks for the help. However, you can easily compare the proportions of each category using e.g. Can you suggest me reference documents about this? You do not necessarily have to use 9 different age groups. Can you clarify your question, I do not understand what you need exactly. kindly help me, With sample sizes of 300, your margin of error will be 5,5% for the population of 7183 and 5,3% for the population of 2500 (level of confidence = 95%) Generally, we accept a margin of error of maximum 5%, which can be achieved with sample sizes of 365 and 334 respectively. After calculation of sample size you have to correct for the total population SSadjusted = (SS) / (1 + [(SS – 1) / population]) In your case: SS = (1,96²) * 0,5*0,5 / 0,05² = 384 SSadj. Before this my estimation is about 300 birder in Malaysian but is not actual number. Having said that, as I explained in previous comments you do not necessarily need the population size to calculate the sample size. This the same number you will find via our calculator: http://www.checkmarket.com/market-research-resources/sample-size-calculator/, can you suggest a formula to sampple size for the mean of a known population, can you suggest a formula to sample size for the mean of a known population. SS = (Z-score)² * p*(1-p) / (margin of error)² Z-score = 2,01 for confidence level 95,45% When the proportion p is not known, it is common to use 0,5. The number of my population will be hundreds of millions if I consider any international passenger in my population. You can calculate your sample size via our calculator (http://www.checkmarket.com/market-research-resources/sample-size-calculator/).

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