What is a normal curve and why is it important for statistical analysis? Define z-scores and describe why they are important for statistical analysis.
The area under normal curve often has all the cases in any normal distribution. Normal distributions comprise of all set of values from one variable with a display made in a histogram. The characteristics of the normal curve are applied in statistics in the process of establishing the probability of an event occurring.
The z-scores are used to establish the number of standard deviations a variable is from the mean. Z-scores are important in statistics as their characteristics are used in the estimation of the probability of an event occurring.

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