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  2. Best CD rates today: Stay ahead of Fed cuts with ... - AOL

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    Lock in today's best rates in decades on certificates of deposits on a range of CD terms — from 6 months to 5 years. ... Stay ahead of Fed cuts with guaranteed 4.65% APY on terms of 6+ months ...

  3. What Is APY and What Does It Mean for Your Savings Account? - AOL

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  4. Interest - Wikipedia

    en.wikipedia.org/wiki/Interest

    This is an accepted version of this page This is the latest accepted revision, reviewed on 18 December 2024. This article is about the financial term. For other uses, see Interest (disambiguation). Sum paid for the use of money A bank sign in Malawi listing the interest rates for deposit accounts at the institution and the base rate for lending money to its customers In finance and economics ...

  5. Letter frequency - Wikipedia

    en.wikipedia.org/wiki/Letter_frequency

    The California Job Case was a compartmentalized box for printing in the 19th century, sizes corresponding to the commonality of letters. The frequency of letters in text has been studied for use in cryptanalysis, and frequency analysis in particular, dating back to the Arab mathematician al-Kindi (c. AD 801–873 ), who formally developed the method (the ciphers breakable by this technique go ...

  6. Pi - Wikipedia

    en.wikipedia.org/wiki/Pi

    The sample mean of | W 200 | is μ = 56/5, and so 2(200)μ −2 ≈ 3.19 is within 0.05 of π. Another way to calculate π using probability is to start with a random walk , generated by a sequence of (fair) coin tosses: independent random variables X k such that X k ∈ {−1,1} with equal probabilities.

  7. Coefficient of determination - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_determination

    Ordinary least squares regression of Okun's law.Since the regression line does not miss any of the points by very much, the R 2 of the regression is relatively high.. In statistics, the coefficient of determination, denoted R 2 or r 2 and pronounced "R squared", is the proportion of the variation in the dependent variable that is predictable from the independent variable(s).

  8. Coefficient of variation - Wikipedia

    en.wikipedia.org/wiki/Coefficient_of_variation

    This follows from the fact that the variance and mean are independent of the ordering of x. Scale invariance: c v (x) = c v (αx) where α is a real number. [22] Population independence – If {x,x} is the list x appended to itself, then c v ({x,x}) = c v (x). This follows from the fact that the variance and mean both obey this principle.

  9. List of lingua francas - Wikipedia

    en.wikipedia.org/wiki/List_of_lingua_francas

    Today, although to a much diminished degree after World War II, it is still a common second language in a few countries which were formerly part of the empire, such as Slovenia (50% of the population, next to English with 57%), Croatia (34%), [47] the Czech Republic (28%) and Slovakia (28%). In others, it survived so far as a minor language (in ...