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  2. Scanning acoustic microscope - Wikipedia

    en.wikipedia.org/wiki/Scanning_acoustic_microscope

    A scanning acoustic microscope (SAM) is a device which uses focused sound to investigate, measure, or image an object (a process called scanning acoustic tomography). It is commonly used in failure analysis and non-destructive evaluation .

  3. Differential item functioning - Wikipedia

    en.wikipedia.org/wiki/Differential_item_functioning

    Differential item functioning (DIF) is a statistical property of a test item that indicates how likely it is for individuals from distinct groups, possessing similar abilities, to respond differently to the item. It manifests when individuals from different groups, with comparable skill levels, do not have an equal likelihood of answering a ...

  4. Simple random sample - Wikipedia

    en.wikipedia.org/wiki/Simple_random_sample

    The principle of simple random sampling is that every set with the same number of items has the same probability of being chosen. For example, suppose N college students want to get a ticket for a basketball game, but there are only X < N tickets for them, so they decide to have a fair way to see who gets to go.

  5. Here Are the 3 Big Differences Between Costco and Sam's Club

    www.aol.com/3-big-differences-between-costco...

    One of the most noticeable differences between Costco and Sam's Club is the membership price. Sam's Club members pay $50 to $110 per year. A Club membership costs $50, and a Plus membership is $110.

  6. Sam’s Club vs. Costco: 4 Ways They’re Similar (and 4 Ways ...

    www.aol.com/finance/sam-club-vs-costco-4...

    And you won’t find a Sam’s Club outside of the U.S. or Puerto Rico. Costco has over 200 international locations, the majority of them in the United Kingdom and Mexico. Same: Additional Members ...

  7. Sam’s Club vs. Costco: How To Choose the Best ... - AOL

    www.aol.com/sam-club-vs-costco-choose-192832145.html

    A division of Walmart Inc., Sam’s Club got its start in 1983 when founder Sam Walton decided to open a store to offer that offered the goods and services needed by small businesses.

  8. Spot the difference - Wikipedia

    en.wikipedia.org/wiki/Spot_the_difference

    Solving "Spot the difference" by overlaying the left image (top left) with an inverse image (bottom left) of the right one (top right). Differences appear as non grey parts (bottom right) A way to solve a spot the difference puzzle digitally is to create a inverse version of one of the images to compare and to overlay it 50% on the other one.

  9. The 5 Biggest Reasons to Choose Sam's Club Over Costco - AOL

    www.aol.com/5-biggest-reasons-choose-sams...

    Plus, while Costco's website jacks up prices on the few items you can get shipped, Sam's Club generally has the same prices online as in store. Even better, shipping on orders of $50 or more is ...