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Attention deficit hyperactivity disorder (ADHD) [1] is a neurodevelopmental disorder characterized by symptoms of inattention, hyperactivity, impulsivity, and emotional dysregulation that are excessive and pervasive, impairing in multiple contexts, and developmentally inappropriate. [9] ADHD symptoms arise from executive dysfunction. [18]
The arithmetic mean (or simply mean or average) of a list of numbers, is the sum of all of the numbers divided by their count.Similarly, the mean of a sample ,, …,, usually denoted by ¯, is the sum of the sampled values divided by the number of items in the sample.
Two main statistical methods are used in data analysis: descriptive statistics, which summarize data from a sample using indexes such as the mean or standard deviation, and inferential statistics, which draw conclusions from data that are subject to random variation (e.g., observational errors, sampling variation). [4]
The prevalence of attention deficit hyperactivity disorder was found to be 3.4% overall in Riyadh, Saudi Arabia, among primary school students between the years of 2015 and 2016, with 22 children having symptoms that were both reported by their parents and teachers. The gender split among them was 3:1, with 13 (5.7%) boys and 9 (2.1%) girls. [17]
Data mining is a particular data analysis technique that focuses on statistical modeling and knowledge discovery for predictive rather than purely descriptive purposes, while business intelligence covers data analysis that relies heavily on aggregation, focusing mainly on business information. [4]
Some sociologists consider ADHD to be an example of the medicalization of deviant behavior, that is, turning the previously non-medical issue of school performance into a medical one. [3] [4] Most healthcare providers accept ADHD as a genuine disorder, at least in the small number of people with severe symptoms. [4]
These summaries may either form the basis of the initial description of the data as part of a more extensive statistical analysis, or they may be sufficient in and of themselves for a particular investigation. For example, the shooting percentage in basketball is a descriptive statistic that summarizes the performance of a player or a team ...
The mean signed difference is derived from a set of n pairs, (^,), where ^ is an estimate of the parameter in a case where it is known that =. In many applications, all the quantities θ i {\displaystyle \theta _{i}} will share a common value.