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14 hours ago · Pearson's correlation coefficient, when applied to a sample, is commonly represented by and may be referred to as the sample correlation coefficient or the sample Pearson correlation coefficient. We can obtain a formula for r x y {\displaystyle r_{xy}} by substituting estimates of the covariances and variances based on a sample into the formula ...
14 hours ago · Richard Feynman in 1984. In theoretical physics, a Feynman diagram is a pictorial representation of the mathematical expressions describing the behavior and interaction of subatomic particles. The scheme is named after American physicist Richard Feynman, who introduced the diagrams in 1948. The interaction of subatomic particles can be complex ...
14 hours ago · t. e. The cosmic microwave background ( CMB or CMBR) is microwave radiation that fills all space in the observable universe. It is a remnant that provides an important source of data on the primordial universe. [1] With a standard optical telescope, the background space between stars and galaxies is almost completely dark.
14 hours ago · Zayn Malik. Zain Javadd Malik ( / ˈmælɪk / MAL-ik; born 12 January 1993), known professionally as Zayn Malik or simply Zayn, is a British singer and songwriter. Malik auditioned as a solo contestant for the British music competition television series The X Factor in 2010. After being eliminated, he was brought back to the competition to form ...
14 hours ago · Etymology and definitions According to legal scholar Fred R. Shapiro, the term "sexism" was most likely coined on November 18, 1965, by Pauline M. Leet during a "Student-Faculty Forum" at Franklin and Marshall College. Specifically, the word sexism appears in Leet's forum contribution "Women and the Undergraduate", and she defines it by comparing it to racism, stating in part, "When you argue ...
