The following is according to my understanding.<\/p>\n\n
\nMy earlier coverage of a Google Sheets way to use the normal cdf one will find in my post from January 24.<\/a> Then, in my post on January 27<\/a>, I show how to use the normal cdf on the TI-83 Plus. One who uses both will notice their different approaches.<\/p>\n \nThe TI-83 Plus assumes the user understands the use of the normal distribution for finding the proportion of the population between two values of a normal distribution. For someone not expecting that, the lower bound requirement might come as a surprise. Yet, for someone who is used to the normal distribution, it’s very convenient. Moreover, the TI-83 Plus is not the only calculator I’ve encountered that’s set up this way.<\/p>\n \nTo find, on Google Sheets, the proportion of a population between two values of a normal distribution, one can simply do two calculations, and afterward subtract. Here’s an example:\n<\/p>\n \nSuppose the mean mile time of track-and-field students is 345 seconds with standard deviation 34 seconds. What percent of them run the mile between 295 and 305 seconds?<\/p>\n \nSolution: To find the proportion whose run times are between 295s and 305s, the user can apply NORMDIST twice, then subtract, as follows:<\/p>\n \nLet’s imagine in Cell E5 one enters =normdist(295,345,34,1): the answer, it seems, will be 0.07070 rounded. Then, in Cell F5, one enters =normdist(305,345,34,1): the answer, it seems, will be 0.11970 rounded. Next, in Cell G5, one can enter = F5 – E5: the answer, it seems, will be 0.04900 rounded.<\/p>\n \nThe meaning of the answer in Cell G5 is that the proportion of the students who run the mile between 295s and 305s is 0.049, or 4.9 percent.<\/p>\n \nTo get the same answer on the TI-83 Plus, one would key in 2nd VARS 2 295,305,345,34) Enter.<\/p>\n \nSource:<\/p>\n support.google.com NORMDIST<\/a><\/p>\n Texas Instruments (1999). TI-83 Plus Graphing Calculator Guidebook<\/em>. Texas Instruments Incorporated.<\/p>\nJack of Oracle Tutoring by Jack and Diane,<\/a> Campbell River, BC.\n","protected":false},"excerpt":{"rendered":" Tutoring statistics, one encounters various electronic facilities. The tutor compares Google Sheets with the TI-83 Plus using the normal cdf. The following is according to my understanding. My earlier coverage of a Google Sheets way to use the normal cdf …<\/p>\n