Business Modeling- t-Test
Statistics- Overview of t-Tests
A t-test is the most frequently used test in the field of statistics. It’s often used to determine the difference between population mean and sample mean or two sample means.
Statistics- One Sample t-Test
One sample t-test is use to find the variation between one sample mean and population mean.
Statistics- z- test vs t-Tests
Database Management Systems- Introduction to Joins
A SQL join clause combines records from two or more tables in a relational database. There are 4 main kinds of JOIN statements- INNER JOIN, LEFT JOIN, RIGHT JOIN and FULL JOIN. An overview of all the main JOINs is given in the following 2 videos. Don't worry if you don't understand all of it. We will cover each JOIN statement individually and give you enough practice to get used to it. Read a simple explanation after watching the videos below.