Statistic
Characteristic or measure obtained from a sample
Parameter
Characteristic or measure obtained from a population
Mean
Sum of all the values divided by the number of values. This can either be a population mean (denoted by mu) or a sample mean (denoted by x bar)
Median
Hi.. Expert Web Scraper & Data Minor here. I have done too many similar project in past. Having best scraping tools and experience i assure you 100% accurate and good quality work.