A/B Testing A/B testing is a form of hypothesis testing that allows you to make comparisons between two distributions. You'll almost never be explicitly asked to perform an A/B test. Make sure you can identify situations where the test is appropriate and know how to correctly implement each step. The following statements are the unordered steps of an A/B hypothesis test: 1. Choose a test statistic (typically the difference in means between two categories) 2. Shuffle the labels of the original sample, find your simulated test statistic, and repeat many times 3. Find the value of the observed test statistic 4. Calculate the p-value based off your observed and simulated test statistics 5. Define a null and alternate model 6. Use the p-value and p-value cutoff to draw a conclusion about the null hypothesis Make an array called ab_test_order that contains the correct order of an A/B test, where the first item of the array is the first step of an A/B test and the last item of the array is the last step of an A/B test.

Local area networks use many of the same network technologies and the internet, only on a smaller scale. devices that access lans are equipped with a network interface that contains circuitry for wireless or wired connections. devices also have a physical address, in addition to the ip addresses acquired from a dhcp server. the most popular wired technology is . the most popular wireless technology is , which can be configured as a(n) or star topology. setting up a lan and configuring its router is fairly easy. the first step is to change the standard to one that is secure. next, create a(n) that uniquely identifies the network by name. it is also important to activate wireless to prevent wireless signals from being intercepted during transmission. a limited-access network can be created for visitors to use. by activating , the router will be able to assign ip addresses to each device that joins the network. to connect to a secure lan that is protected by encryption, an encryption , or password, is required. lans can be used to access data collected by iot devices and the networks that tie these devices together. technologies such as rfid, nfc, bluetooth smart, zigbee, and z-wave offer -power links, essential for battery-powered devices that can’t expend excess amounts of energy transmitting data.