What are some examples of z-scores in statistics?
An example of an AI chatbot conversation about z-scores in statistics.
What are some examples of z-scores in statistics?
Z-scores measure how many standard deviations an element is from the mean. For example, if a student's test score is 85, the mean is 75, and the standard deviation is 5, the z-score would be 2.
Can you give me another example?
Sure! If a data point is 50, the mean is 40, and the standard deviation is 10, the z-score would be 1. This means it's 1 standard deviation above the mean.
How do you calculate a z-score?
The formula for calculating a z-score is: z = (X - μ) / σ, where X is the value, μ is the mean, and σ is the standard deviation.
What does a z-score of 0 mean?
A z-score of 0 indicates that the data point is exactly at the mean of the dataset.
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