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Population rxy sampleb - PowerPoint PPT Presentation

http://www.york.ac.uk/depts/maths/histstat/people/

October 28 and 29. Sir Francis Galton. Karl Pearson. http://www.york.ac.uk/depts/maths/histstat/people/. Source: Raymond Fancher, Pioneers of Psychology. Norton, 1979. A correlation coefficient is a numerical expression of the degree of relationship between two continuous variables.

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GOSSET, William Sealy 1876-1937

GOSSET, William Sealy 1876-1937. The t-distribution is a family of distributions varying by degrees of freedom ( d.f. , where d.f. = n -1). At d.f. = ? , but at smaller than that, the tails are fatter. X - ?. X - ?. _. _. z = . t = . -. -. ? X. s X. s. -. s X = . ? N.

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Population rxy sampleb - PowerPoint PPT Presentation

http://www.york.ac.uk/depts/maths/histstat/people/

GOSSET, William Sealy 1876-1937