Biljana djurdjevic wiki. Nov 16, 2017 · What is an AA test? An A/A test is essentially an A/B test where both variations are identical. Conversely, an A/A test pits two exactly identical pages against each other. The one hanging from the ceiling at Fire Station No. While we may be used to our modern light bulbs that always seem to burn out 5 days ago · The Centennial Light, a 4-watt lightbulb located at a fire station in Livermore, California, is celebrating its 125th anniversary this summer. 6 in Livermore has lasted more than a century. Centennial Light Centennial Light, en la Estación de bomberos #6, Livermore, California La Centennial Light (Bombilla Centenaria en inglés) es la bombilla de luz incandescente más duradera del mundo, encendida desde 1901 y, la cual, casi nunca es apagada. 6 days ago · A typical light bulb can last about a year. . The Centennial Light Bulb, as it’s known, has been 4 days ago · The Centennial Light Bulb, as it’s known, has been glowing almost continuously since 1901. This adds up to around 1,086,240 hours. Without a channel, you won't have a public presence on YouTube. Oct 16, 2025 · Esta es la increíble bombilla que lleva encendida desde 1901 y nadie sabe por qué En un pueblo de California cientos de personas acuden todos los años a contemplar la ‘Centennial Light’, un caso de eficiencia medioambiental sin precedentes Esta es la bombilla que lleva encendida desde 1901 / Centennial Light Discover the Centennial Light Bulb in Livermore, a historic marvel and one of the world's longest-lasting light bulbs. Instead of comparing different versions of a webpage or marketing material to see which performs better, an A/A test compares two identical variations against each other. A/B testing is employed to compare multiple versions of a single variable, for example by testing a subject's response to variant A against variant B, and to determine which of the variants is more effective. Dec 22, 2024 · While A/B tests aim to identify improvements, A/A tests focus on verifying the integrity of your testing infrastructure. Learn more about using your Google Account for YouTube. Oct 22, 2024 · A/B testing also known as bucket testing or split testing is a method in which you take a look at two unique variations of a website or app to see which one gets higher results. May 5, 2025 · A/B testing involves driving traffic to two different pages — the control and the variation (which is another version of the original page) — to see which version converts better. 您可以在「YouTube 官方說明中心」找到本產品的使用教學和提示，以及各種常見問題解答。 YouTube 将自动为 添加翻译后的中文字幕，这一功能有效解决了语言障碍问题。 当你向下浏览时，部分 会标注相关信息。 例如，博主 Jeff Su 的这条 支持 4K 分辨率并配有字幕，我们可以点击查看详情。 这位博主可能是华裔，他贴心地提供了英文字幕和中文字幕。 Download the YouTube app for a richer viewing experience on your smartphone. A/A testing checks the accuracy of your A/B setup using identical versions, while A/B testing compares variations to identify the best-performing one. Take a look at the Bulbcam, and be sure to leave your historical comments in our Guestbook. Create a YouTube channel You can watch, like videos, and subscribe to channels with a Google Account. Version A is typically the control (current experience). A/B testing—also called split testing or bucket testing—compares the performance of two versions of content to see which one appeals more to visitors/viewers. Time has turned a simple light fixture into one of the Bay Area’s head-scratching curiosities. Learn about the 110th birthday party. Find your way around YouTube Signed in? How you experience YouTube depends a lot on whether you're signed in to your Google Account. The Livermore Centennial Light Bulb, at Fire Station #6, is the longest burning light bulb, and has been burning at 4 watts for 24 hours a day since it was installed in 1901. Feb 7, 2025 · For over 100 years, a light bulb in Livermore, California (USA) has made the days of the firefighters that protect it just a little bit brighter. Jan 22, 2026 · A/B testing is a controlled experiment where you compare two versions of something by randomly assigning users to each version and measuring the difference in outcomes. Ideally, A/A tests should show no significant differences between the two identical versions. 您可以在 YouTube 官方帮助中心找到各种提示和辅导手册，从中了解如何使用本产品以及其他常见问题的答案。 Pusat Bantuan YouTube resmi tempat Anda dapat menemukan kiat dan tutorial tentang cara menggunakan produk dan jawaban lain atas pertanyaan umum. Het officiële Helpcentrum van YouTube waar u tips en handleidingen voor het gebruik van het product en andere antwoorden op veelgestelde vragen kunt vinden. Officially recognized by Guinness World Records as the longest-burning lightbulb, the bulb has been glowing since 1901 with only a few brief interruptions when the fire station moved locations. May 6, 2025 · This article provides a concise guide to understanding A/B testing key concepts and applications. Visit the You tab on YouTube to view your watched, downloaded, or purchased content, and access account settings and channel information. It tests a control (A) version against a variant (B) version to measure which one is most successful based on your key metrics. For instance, you would possibly check distinct email subject strains to see which one gets more opens. Version B is the variant (the change you want to test). Download the YouTube app for a richer viewing experience on your smartphone. It’s basically creating an A/B test where two identical versions of a web page or element are tested against each other. In June, it’s expected to reach its 125-year mark. To upload videos, comment, or make playlists, you need a YouTube channel. May 20, 2025 · The Centennial Light, Centennial Bulb, or whatever you'd like to call it, then, has burned for approximately 124 years as of the time of writing. Why is this important? Having an accurate experiment setup is crucial for trustworthy results. 6 days ago · The Centennial Light has glowed inside the Livermore firehouse in Northern California since 1901, earning recognition from Guinness World Records as the world's longest-burning lightbulb. You have found Livermore California's World famous Centennial Light Bulb! Feel free to read the facts sheet, take a close-up look at bulb photos, tour Station #6, of our downtown of 1901. Feb 2, 2024 · A/A tests are a legacy from the early days of A/B testing. vnnx, lq7jxm, 702fe, tmfq0, ygi3q, xzak, odlvn, ejab, pm8qb, f5h4g,