![]() The sequential procedure works like this:Īt the beginning of the experiment, choose a sample size \(N\).Īssign subjects randomly to the treatment and control, with 50% probability each. Sequential sampling allows the experimenter to stop the trial early if the treatment appears to be a winner it therefore addresses the “peeking” problem associated with eager experimenters who use (abuse) traditional fixed-sample methods. In this post, I will describe a simple procedure for analyzing data in a continuous fashion via sequential sampling. iMac Retina 4K Display (21.5" Late 2015) - Model ID:iMac16,2 - 3.1GHz i5, 3.Stopping an A/B test early because the results are statistically significant is usually a bad idea.iMac Retina 5K Display - (27-inch Late 2014) - Model ID: iMac15,1 - 3.5GHz i5, 4.0GHz i7.A notice:Īura Pro X2 SSDs can only be installed in 21.5-inch iMac models that come with a factory-installed SSD or Fusion drive. Sequential read (max) performance numbers are based on testing using AJA System Test (4K full resolution, 64GB file size, 16bit RGBA codec, Single File Test) on a 2019 iMac 27" Retina 5K (iMac19.1) (1) Apple iMac A1419 27" Display Tape Set.(1) Apple iMac A1418 21.5" Display Tape Set.(1) OWC Blue Microfiber Screen Cleaning Wipe.System requirement: at least macOS 10.13. ![]()
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