You can also copy and paste lines of data from spreadsheets or text documents. Enter values separated by commas or spaces. With the last method above enter a sample set of values. With the first method above, enter one or more data points separated by commas or spaces and the calculator will calculate the z-score for each data point provided from the same population.
A sample that is used to calculate sample mean and sample size population mean and population standard deviation.Sample mean, sample size, population mean and population standard deviation.
A raw data point, population mean and population standard deviation.This calculator can find the z-score given: You can also determine the percentage of the population that lies above or below any z-score using a z-score table. A negative z-score means it's lower than average. The z-score allows you to compare data from different samples because z-scores are in terms of standard deviations.Ī positive z-score means the data value is higher than average.
When you calculate a z-score you are converting a raw data value to a standardized score on a standardized normal distribution. You can calculate a z-score for any raw data value on a normal distribution. The z-score is the number of standard deviations a data point is from the population mean.
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