Have you ever wondered how TV ratings are calculated? For those not in the know, ratings refer to the number of households watching TV. This has been calculated for years, far before the internet was able to make collecting data simpler. There are around 120 million TV homes in the US, so you might wonder how they poll that large of a group. The company Nielsen has been the primary statistics group in charge of TV and their numbers are vital in the process because they dictate how much money advertisers pay for commercials, which are the primary revenue source. Judging by the site that you are on, you probably already figured out that statistics come into play here and statistics tutors in Toledo can help show you how it all works.
TV numbers are a perfect practical example of statistics in life because most students watch some TV. You understand what you are talking about and it is probably more interesting than analyzing a generic sampling. With a statistics tutor, you can go in depth to learn about creating an accurate sample.
For Nielsen, this means placing “Nielsen boxes” in a certain number of households spread across the country. They do not have the capacity to give one to every one of the 120 million homes, so they shrink down their sample size to around 40,000 households and make inferences based on the data. If you are not a Nielsen family, you have probably never seen the box, which delivers viewing data to Nielsen. Each member of the household is given a special button to turn on at the start of watching and turn off at the end, so they can even get data on how much of the show is seen. For events like the Super Bowl, where people often host parties with their friends and have more than one person watching on just one TV, there are buttons to indicate how many people are watching.
Using this representative sample, Nielsen is able to extrapolate information about the whole market. As you might learn with a Toledo statistics tutor, increasing the sample size gives the most accurate data. You can work with your math tutor to decide if 40,000 is really enough to accurately report the habits of a 120 million household population.