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Ryan Nolan

Ryan is a Data Scientist at a fintech company, where he focuses on fraud prevention in underwriting and risk. Before that, he worked as a Data Analyst at a tax software company. He holds a degree in Electrical Engineering from UCF.

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Statistics

Python Z-Score

June 19, 2025 Ryan Nolan No comments yet

We are going to be looking at Python Z-score. Z-score tells us how far a data poin is from the mean. To start we’re going to import the necessary libraries. numpy as np, stats and pandas Example 1 Numpy Let’s create a list of numbers called data containing a sequence of integers. Next we calculate […]

Python

Python Operators

June 19, 2025 Ryan Nolan No comments yet

We are going to be Covering Arithmetic, Comparism, Logical and Assignment Arithmetic Operators Arithmetic Operators are used to perform mathematical operations like addition, subtraction , multipliation e.t.c Example 1 Addition Here we add a + b using th python addition operator Example 2 Subtraction Here, we subtract b from a using the python subtraction operator […]

Python

Python tuples

June 16, 2025 Ryan Nolan No comments yet

we are going to be looking at Python Tuples. Some characteristics of tuples are: Tuple data never change.Tuples are used to store multiple items in a single variable.Tuples are ordered and unchangeable.Since tuples are indexed, they can have items with the same value.  https://youtu.be/2LV2T7KLJaI we start by creating a tuple called “tuple1”. Notice the type of […]

Python

Python While Loops

June 16, 2025 Ryan Nolan No comments yet

We are going to be looking at the While loop in python. The while loop in python is a control flow statement that repeatedly executes a block of code as long as a specified condition is true. Example 1 Basic While Loop Here, we are using the while loop to print numberd from 1 to […]

Linear Algebra

eigenanalysis Python

June 15, 2025 Ryan Nolan No comments yet

Example from slides 3×3 Example

Python

Shapiro-Wilk Test Python

June 15, 2025 Ryan Nolan No comments yet

#Uniform Example General #Example with a Paired T Test

Python

mann-whitney u test python

June 15, 2025 Ryan Nolan No comments yet

#similiar to t test for independent samples#that t test looks at the mean #mann-whitney u loks at rank sum difference#sort from smallest to largest (smallest rank 1 largest last rank)#example rank group 1 sum 36 rank group sum 2 42 #confirm data is not normally distributed #write null and alternative hypothesis#The Mann-Whitney U Test is […]

Statistics

Spearman Rank Correlation

June 15, 2025 Ryan Nolan No comments yet

Spearman Rank Correlation [Simply explained] Example 2 Fast wth scipy

Python

One-Way ANOVA

June 15, 2025 Ryan Nolan No comments yet

https://youtu.be/e0lum-6vuw4 ANOVA (Analysis of Variance) is a statistical method used to compare the means of three or more groups to determine whether at least one group mean is significantly different from the others. If the difference in means is only due to random variation, we accept the null hypothesis (H₀). If the differences are larger […]

Statistics

python covariance matrix

June 12, 2025 Ryan Nolan No comments yet

Example 1 Manual #The positive value of 3.6 indicates that the prices of Stock A and Stock B tend to move in the same#direction. When the price of Stock A increases, the price of Stock B also tends to increase,#and vice versa. Example 2 Numpy Sample Covariance Example 4 Pandas Sample – No Option Example […]

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