Worked example of Logistic Regression with Julia on the Pima Diabetes Dataset

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The Sortino Index is a risk-adjusted return metric that measures the performance of an investment relative to the downside deviation, which is the standard deviation of returns below a specified minimum acceptable return (MAR). It is similar to the Sharpe ratio, but focuses only on downside risk rather than total volatility.

The Treynor Index is a risk-adjusted performance metric used to evaluate the performance of an investment portfolio, especially in comparison to a benchmark. It measures the excess return of an investment portfolio relative to the risk-free rate per unit of systematic risk.

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Creating a Julia Function to compute the Geometric Mean of a dataset

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