Confidence Intervals for One Mean: Determining the Required Sample Size.

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I find the sample size required to obtain a given margin of error in a confidence interval for mu. I discuss the appropriate formula and work through an example.
  1. jbstatistics
  2. minimum sample size
  3. minimum
  4. sample
  5. size
  6. required sample size
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Комментарии
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Thanks for the feedback and I'm glad you liked it. I'll definitely be updating with new topics.

jbstatistics
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Thanks! It will only work perfectly if one is sampling from a normally distributed population. But, for large sample sizes, it will work reasonably well for other distributions. I look into the effect of sampling from different types of distribution in my "Confidence Intervals for One Mean: Assumptions" video.

jbstatistics
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I'm not sure what you're asking. This video explains how to get the needed sample size for a given margin of error and confidence level. We'd also need to know the variance, or have a reasonable estimate of it, in order to find the minimum sample size.

jbstatistics
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how would i find sample size with 90% confidence interval and 2.5 % margin of error? im confused

osvaldo
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Where do you get 1.96 all of a sudden???!!!

Jojobreez
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ive been looking around but i cant seem to find the needed sample size from just the margin of error and the confidence interval,
can you help?

osvaldo