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  2. Truncated mean - Wikipedia

    en.wikipedia.org/wiki/Truncated_mean

    Similarly, if interpolating the 12% trimmed mean, one would take the weighted average: weight the 10% trimmed mean by 0.8 and the 20% trimmed mean by 0.2. Advantages [ edit ] The truncated mean is a useful estimator because it is less sensitive to outliers than the mean but will still give a reasonable estimate of central tendency or mean for ...

  3. 1% rule - Wikipedia

    en.wikipedia.org/wiki/1%_rule

    1% rule. In Internet culture, the 1% rule is a general rule of thumb pertaining to participation in an Internet community, stating that only 1% of the users of a website actively create new content, while the other 99% of the participants only lurk. Variants include the 1–9–90 rule (sometimes 90–9–1 principle or the 89:10:1 ratio ), [1 ...

  4. Atomic ratio - Wikipedia

    en.wikipedia.org/wiki/Atomic_ratio

    Atomic ratio. The atomic ratio is a measure of the ratio of atoms of one kind (i) to another kind (j). A closely related concept is the atomic percent (or at.% ), which gives the percentage of one kind of atom relative to the total number of atoms. [1] The molecular equivalents of these concepts are the molar fraction, or molar percent .

  5. Middle gray - Wikipedia

    en.wikipedia.org/wiki/Middle_gray

    Middle gray. 50% CIELAB lightness. ( Y = 18.4%) In photography, painting, and other visual arts, middle gray or middle grey is a tone that is perceptually about halfway between black and white on a lightness scale; [1] in photography and printing, it is typically defined as 18% reflectance in visible light. [2] [3]

  6. List of HTTP status codes - Wikipedia

    en.wikipedia.org/wiki/List_of_HTTP_status_codes

    An expansion of the 400 Bad Request response code, used when a client certificate is required but not provided. 497 HTTP Request Sent to HTTPS Port. An expansion of the 400 Bad Request response code, used when the client has made a HTTP request to a port listening for HTTPS requests. 499 Client Closed Request.

  7. Ohio - Wikipedia

    en.wikipedia.org/wiki/Ohio

    More than 20 percent As of 2011, 27.6% of Ohio's children under the age of 1 belonged to minority groups. [135] Approximately 6.2% of Ohio's population was under five years of age, 23.7% under 18 years of age, and 14.1% were 65 or older; females made up an estimated 51.2% of the population.