Statistics for Data Science and Business Analysis - Student's T Distribution

The video tutorial discusses the contributions of William Gossett, an English statistician who worked for Guinness and published under the pen name 'Student'. His work led to the development of the Student's T distribution, a significant breakthrough in statistics for making inferences from small samples. The tutorial explains the visual and mathematical properties of the T distribution, including its fatter tails and relation to the normal distribution. It also covers the concept of degrees of freedom and the use of the T table, highlighting when to use the T table versus the Z table. The video concludes with a summary and a preview of the next lecture.

What are degrees of freedom and how do they relate to the T statistic?

When should a researcher use the Z table instead of the T table?