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how to calculate z score for sample mean. X is the sample mean. You will need all the numbers in your sample to start your calculations.
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Alpha a and the type of tail two-tailed left-tailed or right-tailed. Zdfrac text data point-text mean text standard deviation z standard deviationdata point mean. For this apply the STANDARDIZE function for the given data values as per below screenshot.
The z-score can be calculated by subtracting the population mean from the raw score or data point in question a test score height age etc then dividing the difference by the population standard deviation.
You will need all the numbers in your sample to start your calculations. X is the sample mean. S is the population standard deviation. Check out the course here.
