16 июл. 2019 г. · Basically the variance of any distribution is sum of squares / sample size, but if you have a predictable distribution function (eg binomial, Poisson, whatever)

23 янв. 2019 г. · Instead of calculating a z-score and looking up the probability in a table, you need to look up the probability in the table and find the corresponding z-score.

12 авг. 2015 г. · A z-score is simply the number of standard deviations away from the mean (μ). You said anything >z=3.16 will have a probability = 1. Indeed, this is not right.

3 сент. 2022 г. · I have a casio fx-991EX CLASSWIZ calculator and I would like to know if it is possible to calculate the z-score knowing the probability.

17 окт. 2018 г. · You could find the standard deviation, but it is not necessary to do so. The normal distribution is symmetrical about its mean μ=65 mph.

2 апр. 2017 г. · In the first panel you posted, Q seems to be the probability above z under a standard normal curve. So the program gives Q=0.049471 for z=1.65.

30 авг. 2016 г. · (A) Find the 95th percentile of a normal distribution with mean 100 and standard deviation 20. So Z = X−μσ ...

15 сент. 2017 г. · I am trying to calculate the value for a given distribution that is greater than a certain percentile of other elements of that distribution.

9 июн. 2015 г. · Assuming that the standard deviation hasn't changed, calculate the new mean spend per customer. HOW do I calculate the Z Score for these ...

26 июл. 2020 г. · So if you must find the X value greater than 10% in Z = (X - u) / σ . If you look up in the Z value table, there is the option 1.28 (0.1003) or ...