These statistics have been found from a reliable source dealing with alcoholism as a disease. There really is no way of knowing if you will become an alcoholic just because one or both of your parents drink alcohol. guess the bottom line is that if you choose to drink alcohol, then you will get drunk and itâs possible that you will have a battle with it like your mother or father did. Just donât do it at all.
Confidence intervals are also very useful for comparing means or proportions and can be used to assess whether there is a statistically meaningful difference. This is based on whether the confidence interval includes the null value (e.g., 0 for the difference in means, mean difference and risk difference or 1 for the relative risk and odds ratio).
The Variability of the Sample Proportion. To construct a confidence interval for a sample proportion, we need to know the variability of the sample proportion. This means we need to know how to compute the standard deviation and/or the standard error of the sampling distribution. Suppose k possible samples of size n can be selected from the population.