Also, to facilitate the work of the stomach, you must not simultaneously eat liquid and dense food. For example, after you ate breakfast, tea or juice is better not to drink earlier than 1.5 hours. You must not to combine foods rich in protein (meat, curd, milk) with rich carbohydrates (flour products, potatoes).
The Critical Value. The critical value for our margin of error formula is denoted by zÎ±/2. This is the point z* on the standard normal distribution table of z-scores for which an area of Î±/2 lies above z*. Alternately is is the point on the bell curve for which an area of 1 - Î± lies between -z* and z*.
This last expression, then, provides the 95% confidence interval for the population mean, and this can also be expressed as: Thus, the margin of error is 1.96 times the standard error (the standard deviation of the point estimate from the sample), and 1.96 reflects the fact that a 95% confidence level was selected. So, the general form of a confidence interval is: