Average Temperatures for Virginia in October. Average temperatures for October at cities, towns, parks and lakes throughout Virginia are listed below in degrees Fahrenheit and Celsius. The tables give the normals for maximum and minimum temperatures based on weather data collected from 1981 to 2010 by the US National Climatic Data Center.
In statistics, interval estimation is the use of sample data to calculate an interval of possible (or probable) values of an unknown population parameter, in contrast to point estimation, which is a single number.n statistics, interval estimation is the use of sample data to calculate an interval of possible (or probable) values of an unknown population parameter, in contrast to point estimation, which is a single number.
Roughly speaking, a confidence interval is range of numbers within which we believe the true population parameter to fall. Here, we will focus on how to calculate a confidence interval for a population mean. Letâs think about this in terms of z-scores.hen we calculate a z-score, we want to look at how many standard deviations away from the mean our data point falls. A confidence interval relies on a similar principle. We want to estimate how many standard errors our sample mean falls from the true population mean on the sampling distribution.