News from the AI & ML world
DeeperML - #statistics
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Amir Najmi@unofficialgoogledatascience.com
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Data scientists and statisticians are continuously exploring methods to refine data analysis and modeling. A recent blog post from Google details a project focused on quantifying the statistical skills necessary for data scientists within their organization, aiming to clarify job descriptions and address ambiguities in assessing practical data science abilities. The authors, David Mease and Amir Najmi, leveraged their extensive experience conducting over 600 interviews at Google to identify crucial statistical expertise required for the "Data Scientist - Research" role.
Statistical testing remains a cornerstone of data analysis, guiding analysts in transforming raw numbers into actionable insights. One must also keep in mind bias-variance tradeoff and how to choose the right statistical test to ensure the validity of analyses. These tools are critical for both traditional statistical roles and the evolving field of AI/ML, where responsible practices are paramount, as highlighted in discussions about the relevance of statistical controversies to ethical AI/ML development at an AI ethics conference on March 8.
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@medium.com
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Recent publications have highlighted the importance of statistical and probability concepts, with an increase in educational material for data professionals. This surge in resources suggests a growing recognition that understanding these topics is crucial for advancing AI and machine learning capabilities within the community. Articles range from introductory guides to more advanced discussions, including the power of continuous random variables and the intuition behind Jensen's Inequality. These publications serve as a valuable resource for those looking to enhance their analytical skillsets.
The available content covers a range of subjects including binomial and Poisson distributions, and the distinction between discrete and continuous variables. Practical applications are demonstrated using tools like Excel to predict sales success and Python to implement uniform and normal distributions. Various articles also address common statistical pitfalls and strategies to avoid them including skewness and misinterpreting correlation. This shows a comprehensive effort to ensure a deeper understanding of data-driven decision making within the industry.
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@vatsalkumar.medium.com
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Recent articles have focused on the practical applications of random variables in both statistics and machine learning. One key area of interest is the use of continuous random variables, which unlike discrete variables can take on any value within a specified interval. These variables are essential when measuring things like time, height, or weight, where values exist on a continuous spectrum, rather than being limited to distinct, countable values. The concept of the probability density function (PDF) helps us to understand the relative likelihood of a variable taking on a particular value within its range.
Another significant tool being explored is the binomial distribution, which can be applied using programs like Microsoft Excel to predict sales success. This distribution is suited to situations where each trial has only two outcomes – success or failure, like a sales call resulting in a deal or not. Using Excel, one can calculate the probability of various sales outcomes based on factors like the number of calls made and the historical success rate, aiding in setting achievable sales goals and comparing performance over time. Also, the differentiation between binomial and poisson distribution is critical for correct data modelling, with binomial experiments requiring fixed number of trials and two outcomes, unlike poisson. Finally, in the world of random variables, a sequence of them conditionally converging to a constant value has been discussed, highlighting that if the sequence converges, knowing it passes through some point doesn't change the final outcome.
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