anonymous
  • anonymous
Anybody know about z scores?
Mathematics
jamiebookeater
  • jamiebookeater
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anonymous
  • anonymous
http://www.youtube.com/watch?v=1xhCL5m4nI0
Zarkon
  • Zarkon
I'm sure there are plenty of people here that know about z-scores. Do you have a particular question?
anonymous
  • anonymous
Can 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

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anonymous
  • anonymous
If 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.
anonymous
  • anonymous
If 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.
anonymous
  • anonymous
If 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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