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Zarkon
 3 years ago
Best ResponseYou've already chosen the best response.0I'm sure there are plenty of people here that know about zscores. Do you have a particular question?

riplang
 3 years ago
Best ResponseYou've already chosen the best response.0Can you have the same z score in the same set of data? I'm thinking yes because what if you have the same number more than once but not sure

abtrehearn
 3 years ago
Best ResponseYou've already chosen the best response.0If you know the mean and standard deviation, then you can plug them into \[z = (x  \mu)/\sigma,\] wnere mu is the mean and sigma is the standard deviation. Then the probability distribution in x becomes the standard normal distribution in z.

abtrehearn
 3 years ago
Best ResponseYou've already chosen the best response.0If you are given a set of data, you can get their sample mean and sample variance, using the formula for a discrete set of data.

abtrehearn
 3 years ago
Best ResponseYou've already chosen the best response.0If the number of data points is at least thiryt, then the normal approximation to distribution due to the data will be a good approximation.
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