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Boxplot (with an interquartile range) and a probability density function (pdf) of a Normal N(0,σ 2) Population. In descriptive statistics, the interquartile range (IQR) is a measure of statistical dispersion, which is the spread of the data. [1] The IQR may also be called the midspread, middle 50%, fourth spread, or H‑spread.
In simple terms, cognitive behavioral therapy is a psycho-social intervention that aims to reduce symptoms of various mental health conditions, primarily depression and anxiety disorders. While being a wide branch of therapy, it remains very beneficial when tackling specific emotional distress, which is the foundation of PPD.
New Zealand adopted decimal currency in 1967 and the metric system in 1974. Despite this, several imperial measures are still widely encountered and usually understood, such as feet and inches for a person's height, pounds and ounces for an infant's birth weight, and in colloquial terms such as referring to drinks in pints.