zNorm

The zNorm table contains the z Scores and the area under the curve to the left of the z Score for a Normal Distribution.  The table has values from z = -4 to +4 at increments of 0.01.  This table was developed using Microsoft Excel and the NORMSDIST(z) function.        Probability & Normal Distribution  This equates to the probability of an event with a lesser z SCORE:  

STATISTICS CALCULATORS:

• Compute the probability of less than a z Score in a Normal Distribution
• Compute the z SCORE based on the mean and standard deviation
• Compute the z SCORE in a set of observations
• Compute the percentile of a single observation (y) in a set (X)
• Sort a list of numeric values
• Create a random subset of the a list of numeric values
• College Level Statistics Calculator (Stat Calc).

The Math / Science

The z Score of a value (raw score) can be calculated when the population mean and population standard deviation.  The formula for the z score is:

       z = (x-μ) / σ 

where:

• z = standard score
• x = raw score
• μ = population mean
• σ = population standard deviation