Gary’s Blog

A t-test is a fundamental statistical analysis, often employed in hypothesis testing, to determine if there is a statistically significant difference between the means of two groups. The sources indicate that it is a staple analysis frequently used in data analysis due to its utility and relative simplicity. There are primarily three types of t-tests: Read More

another post for students in data analytics In the world of data analysis, especially when we delve into hypothesis testing, our goal is to draw meaningful conclusions from data to answer specific questions. We formulate hypotheses and use statistical tests to determine whether there’s enough evidence to support them. However, the nature of statistical inference Read More

a post for students in data analytics In the realm of data analysis, we often work with samples to understand larger populations. But how confident can we be that our sample accurately reflects the whole? This is where confidence intervals come into play. A confidence interval provides a range of values that is likely to Read More

One more post for data analysis students Ever wondered how a single data point stacks up against the rest? Or how to compare values from different datasets with varying scales? Enter the z-score, a fundamental concept in statistics that provides a standardized way to understand individual data points within a distribution. Sometimes referred to as Read More

another post for students in data analytics In the ever-evolving landscape of data analytics, the ability to draw meaningful conclusions from information is paramount. At the heart of this process lies hypothesis testing, a fundamental statistical technique that empowers data analysts to make informed decisions and answer critical business questions with confidence. It’s more than Read More

One of my favorite things to do is buy books from a seller of overstocked books. I look for titles I need but then I buy other as they ship for one price no matter the number of books in the lot! Johnjoe McFadden’s Life is Simple arrived on my “to read” pile in that Read More