How can I read this summation?
Mathematics

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If you have all the data, what do you do? Sum up all the z,P,Pvg values at once? Or do you do run three separate calculations? How does one interpret this summation?
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Hello. When you are talking about a set of data, I assume you have data from a set of observations. Say there are n number of values you have collected. Let X represent a value from this set. X is your random variable.
We assume X is normal because you want to calculate the Zvalue or Zscore, and Pvalue.
The Zscore is found from the formula : Zscore = (X  (average)) / [(standarddeviation) / sqrt(n) ]
The pvalue is found from the Zscore: pvalue = P ( Z > (Zscore) ), you find the pvalue from the zscore table., Pvalue is the area under the standard normal curve to the right of the zscore.
Please let me know if you need any clarification. I'm always happy to answer your questions.
Does this make sense?
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