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The general form of its probability density function is [2] [3] = (). The parameter μ {\displaystyle \mu } is the mean or expectation of the distribution (and also its median and mode ), while the parameter σ 2 {\textstyle \sigma ^{2}} is the variance .
March 3, 2009: President Obama stated that "Buying stocks is a potentially good deal if you've got a long-term perspective on it". [180] March 6, 2009: The Dow Jones hit its lowest level of 6,469.95, a drop of 54% from its peak of 14,164 on October 9, 2007, over a span of 17 months, before beginning to recover. [181]
A 2017 study found that closing the gender gap in STEM education would have a positive impact on economic growth in the EU, contributing to an increase in GDP per capita of 0.7–0.9% across the bloc by 2030 and of 2.2–3.0% by 2050.