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- E(X^2) = Σx^2 * p(x)To calculate X^2 (X squared), you can use the formula: E(X^2) = Σx^2 * p(x), where Σ represents summation, x is the value of the random variable, and p(x) is the probability that the random variable takes on a given value1. X^2 is also used in statistical tests to compare actual and expected counts2.Learn more:✕This summary was generated using AI based on multiple online sources. To view the original source information, use the "Learn more" links.For a random variable, denoted as X, you can use the following formula to calculate the expected value of X2: E (X2) = Σx2 * p (x) where: Σ: A symbol that means “summation” x: The value of the random variable p (x):The probability that the random variable takes on a given valuewww.statology.org/expected-value-x2/You are now ready for the formula for χ 2, which compares each cell's actual count to its expected count: The formula describes an operation that is performed on each cell and which yields a number. When all the numbers are summed, the result is χ 2.www.cliffsnotes.com/study-guides/statistics/bivariat…
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