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  2. Score tools for 61% off during Presidents' Day: DeWalt ...

    www.aol.com/lifestyle/score-tools-for-61-off...

    Score up to 61% off tools at the Home Depot, Walmart, and Amazon as part of the brands' Presidents' Day deals. Here are the best we've found. ... $90 $120 Save $30. See at Amazon. Jackery Explorer ...

  3. Attention deficit hyperactivity disorder - Wikipedia

    en.wikipedia.org/wiki/Attention_deficit...

    Boys who were born in December where the school age cut-off was 31 December were shown to be 30% more likely to be diagnosed and 41% more likely to be treated than those born in January. Girls born in December had a diagnosis and treatment percentage increase of 70% and 77% respectively compared to those born in January.

  4. COVID-19 testing - Wikipedia

    en.wikipedia.org/wiki/COVID-19_testing

    For all testing, both diagnostic and screening, there is usually a trade-off between sensitivity and specificity, such that higher sensitivities will mean lower specificities and vice versa. Sensitivity and Specificity. A 90% specific test will correctly identify 90% of those who are uninfected, leaving 10% with a false positive result.

  5. Coupon (finance) - Wikipedia

    en.wikipedia.org/wiki/Coupon_(finance)

    Zero-coupon bonds are those that pay no coupons and thus have a coupon rate of 0%. [ 6 ] [ 7 ] Such bonds make only one payment: the payment of the face value on the maturity date. Normally, to compensate the bondholder for the time value of money , the price of a zero-coupon bond will always be less than its face value on any date of purchase ...