Welcome to On Statistics
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How to Calculate the Coefficient of Variation in Python
The Coefficient of Variation (CV) is a measure of the dispersion or spread of a set of data from the mean. It is defined as the ratio of the standard deviation to the mean, expressed as a percentage. The CV is a dimensionless number and is used to compare the dispersion of different sets of…
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How to Find a P-Value from a Z-Score in Python
In statistical analysis, we often encounter the terms z-score and p-value. Both concepts are essential in hypothesis testing and data analysis. However, their relationship might not be immediately clear. In this article, we’ll discuss how to find a p-value from a z-score using Python. What is a Z-Score? A z-score is a standardized value that…
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How to Calculate and Plot the Normal CDF in Python
The Normal Cumulative Distribution Function (CDF) is an essential concept in statistics and probability theory. It describes the probability that a normally distributed random variable X with mean μ and standard deviation σ takes on a value less than or equal to a given value x. In other words, it returns the probability that X…
