🔶 Aʙᴏᴜᴛ Tʜɪs Vɪᴅᴇᴏ – Using the Normal Cumulative Distribution, or Normal CD from the Distribution menu, we are able to calculate a range of different probabilities for the normal distribution. Where we have no lower or upper limit, then we need to use a high value, preferably at least 5 standard deviations away from the mean, but there is no reason not to go higher. Also, the video shows two methods of how you can find the probability for a region split between the upper and lower tail of the graph.