Sample Size
Hi Everyone, am so Privileged and happy to be part of this great Forum. How are you all doing? Please, may I ask;
I am a PhD student, my Thesis Topic is Crisis communication and Management by Airlines in Europe and Africa in the face of Covid19.
My Population entails those who flew only during Covid19 in Europe and Africa, and I have being asked to distribute 400 questionnaires, but I know that I have to use a formulae to be able to obtain the sample size of 400 responses. Which formula do I use?,please, thanks.
Best regards,
Matilda Sase
Best Answers

@Matilda Sase , what is your population? Then you can use Yamane (1967:886) formula, n= N/1+N(e)2, where N is the population size, n is the sample size, e is the level of precision with a 95% level of confidence. This formula will determine the sample size. You can not just pick 400
One thing at a time😍
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Greetings.
Ok. I'll do that. Thanks so much, I feel relieved now. I really appreciate.
With kind regards,
Matilda
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Answers

Hi @Matilda Sase. Welcome to R Voice! It's great to have you here 🙂
I'm going to request some of our more experienced community members to help here. @leonard waks @Suman Mundkur @Omololu FAGBADEBO @Praveena Ramanujam could you please share your thoughts on Matilda's question?
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@Matilda Sase I’m not really sure if I understand your question clearly. I’m not sure if you wish to determine the sample size or you will be working with a predetermined sample size. If you wish to determine the size of the random sample (which will represent the population), this would require a fairly good understanding of statistics. If this is what you wish to know, you may find these two articles useful:
 https://tools4dev.org/resources/howtochooseasamplesize/
 https://www.calculator.net/samplesizecalculator.html
From your question, it seems that the sample size might already have been determined (400), and possibly, you now have to fit a formula to show that this figure is correct. In this case, too, the websites mentioned above will be useful.
Another angle to the problem could be: How should one select random responders (totaling 400) from the population?
If this is the case, it would be a more complex task, since there are many different variables involved. If this is what you wish to know, it might a good idea to get help from a statistical expert or someone with expertise in market research.
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@Soumi Paul Any thoughts on this?
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My survey included a random sampling among academics of mentioned designations with 18 or above age. I suggest, better going through relevant articles that used a formula to determine sample size and perhaps, consult any statisticians in this regard, I also did for my work. I also have attended the relevant handson training workshop.
Communication is the key to thriving! 😊
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