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2. Z-test - Wikipedia

   en.wikipedia.org/wiki/Z-test

   Typical rules of thumb: the sample size should be 50 observations or more. For large sample sizes, the t-test procedure gives almost identical p-values as the Z-test procedure. Other location tests that can be performed as Z-tests are the two-sample location test and the paired difference test.

3. Variance - Wikipedia

   en.wikipedia.org/wiki/Variance

   If the set is a sample from the whole population, then the unbiased sample variance can be calculated as 1017.538 that is the sum of the squared deviations about the mean of the sample, divided by 11 instead of 12. A function VAR.S in Microsoft Excel gives the unbiased sample variance while VAR.P is for population variance.

4. Promotional mix - Wikipedia

   en.wikipedia.org/wiki/Promotional_mix

   Examples include coupons, sweepstakes, contests, product samples, rebates, tie-ins, self-liquidating premiums, trade shows, trade-ins, and exhibitions. [1] [2] [4] [5] Corporate giveaway items, sometimes called swag, can be included within product samples and distributed to participants at an event for promotional purposes.

5. Coupon collector's problem - Wikipedia

   en.wikipedia.org/wiki/Coupon_collector's_problem

   Graph of number of coupons, n vs the expected number of trials (i.e., time) needed to collect them all, E (T ) In probability theory, the coupon collector's problem refers to mathematical analysis of "collect all coupons and win" contests.

6. Reddit - Wikipedia

   en.wikipedia.org/wiki/Reddit

   Reddit Premium (formerly Reddit Gold) is a premium membership that allows users to view the site ad-free. [111] Until 2023, subscribers could also use coins to award posts or comments they valued, generally due to humorous or high-quality content. [ 112 ]

7. List of Pixar films - Wikipedia

   en.wikipedia.org/wiki/List_of_Pixar_films

   Pixar Animation Studios is an American CGI film production company based in Emeryville, California, United States.Pixar has produced 28 feature films, which were all released by Walt Disney Studios Motion Pictures through the Walt Disney Pictures banner, with its first being Toy Story (which was also the first CGI-animated feature ever theatrically released) on November 22, 1995, and its ...