>>649244991Not an expert, just had a couple classes with something similar to this. I think that in the beginning you have some observations from real life. Based on them you try to estimate some parameters, like mean. You cannot just say that the real mean would be the same as the observed mean, that is not a very mathematical thing to do. You make certain assumptions, like the distribution is normal, blah blah. Then you try to estimate the real value of parameters. Then some math stuff happens (sorry, couldnt tell you). Then you say that you are 90% certain that the variable is between 7 and 37. You can try to be more accurate, say that you are 95% certain that the variable is between 6 and 52. Very often, studies require 99% certainty, which brings us to 3 to 75. 100% certainty in death rate would of course be 0-100% which is no a very valuable information. Thats because its statistics and you can never really be 100% sure
