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  2. Data compression ratio - Wikipedia

    en.wikipedia.org/wiki/Data_compression_ratio

    Data compression ratio is defined as the ratio between the uncompressed size and compressed size: = Thus, a representation that compresses a file's storage size from 10 MB to 2 MB has a compression ratio of 10/2 = 5, often notated as an explicit ratio, 5:1 (read "five" to "one"), or as an implicit ratio, 5/1.

  3. Hurricane Katrina effects by region - Wikipedia

    en.wikipedia.org/wiki/Hurricane_Katrina_effects...

    By August 31, eighty percent (80%) of the city of New Orleans was flooded by Hurricane Katrina, with some parts of the city under 20 feet (6.1 m), of water. Over 50 breaches in region's levee system were catalogued, five of which resulted in massive flooding of New Orleans. The 17th Street Canal levee was just south of the Hammond Highway ...

  4. 68–95–99.7 rule - Wikipedia

    en.wikipedia.org/wiki/68–95–99.7_rule

    In statistics, the 68–95–99.7 rule, also known as the empirical rule, and sometimes abbreviated 3sr, is a shorthand used to remember the percentage of values that lie within an interval estimate in a normal distribution: approximately 68%, 95%, and 99.7% of the values lie within one, two, and three standard deviations of the mean, respectively.

  5. Sales taxes in the United States - Wikipedia

    en.wikipedia.org/wiki/Sales_taxes_in_the_United...

    California has the highest base sales tax rate, 7.25%. Including county and city sales taxes, the highest total sales tax as of September 1, 2013, was in Arab, Alabama, 13.50%. [ 2] Sales tax is calculated by multiplying the purchase price by the applicable tax rate. The seller collects it at the time of the sale.

  6. Daily mortgage rates for August 6, 2024: Average rates plunge ...

    www.aol.com/finance/daily-mortgage-rates-for...

    The average rate for shorter 15-year terms is 6.14% for purchase and 6.17% for refinance, down 19 basis points from 6.33% for purchase and down 13 basis points from 6.30% for refinance this time ...

  7. Southwest Airlines plans to start assigning seats, breaking ...

    www.aol.com/news/southwest-breaks-50-tradition...

    American cut its forecast of full-year earnings to between 70 cents and $1.30 per share, down from a previous prediction of $2.25 to $3.25 per share. Shares of the leading U.S. airlines rose after ...

  8. Zipf's law - Wikipedia

    en.wikipedia.org/wiki/Zipf's_law

    The dotted line is the ideal law y ∝ 1/ x. Zipf's law ( / zɪf /, German: [t͡sɪpf]) is an empirical law that often holds, approximately, when a list of measured values is sorted in decreasing order. It states that the value of the n th entry is inversely proportional to n .

  9. IDEA Section 618 Data Products: State Level Data Files

    www2.ed.gov/.../state-level-data-files/index.html

    Help with Accessing and Viewing .CSV Files. There are 12 state-level data collections authorized under Section 618: Part B: Child Count and Educational Environments, Child Count, Educational Environments, Personnel, Exiting, Discipline, Assessment, Dispute Resolution, and Maintenance of Effort Reduction and Coordinated Early Intervening Services.