This discussion centers on the methodology for testing population proportions using either the binomial distribution or the normal distribution. The original poster questions the applicability of the normal distribution given that the sample size is 20 and the product of the sample size and proportion (np) equals 9, which exceeds the threshold of 5. The consensus is that while the binomial method is appropriate, the normal approximation can be utilized under certain conditions, specifically when np and n(1-p) are both greater than 5.
PREREQUISITESStatisticians, data analysts, students in statistics courses, and anyone involved in hypothesis testing related to population proportions will benefit from this discussion.
werson9339 said:Homework Statement
This involve testing population proportion. (either small or big sample) this question is done by my lecturer by using binomial , i am wondering could it be done using normal distribution? because the np is 20(0.45) = 9 which is greater than 5 , https://www.flickr.com/photos/110120...6/15432962168
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