z-score and curve

Question

1.  A. What is the mean and standard deviation for a z-score?

 B. What is the total area under the curve of a normal distribution?

Answer 1

z = (x - μ )/(σ)

μ = the mean of the distribution is the average value (the peak of the distribution)

σ = standard deviation, how much the value deviates from the mean value

total area under the curve for a normal distribution is 1 (meaning 100%)