t検定を学ぶ前に見るべし！母分散既知の場合の母平均の検定。

This time, we'll explain the hypothesis test for the population mean when the population variance is known in an easy-to-understand way. There are various types of hypothesis tests, but the underlying concept is the same. Among them, the hypothesis test for the population mean when the population variance is known is the easiest to understand, so it's recommended to master the concept of hypothesis testing with this first! Please also use this for your QC certification studies. We will continue to deliver videos that are helpful to everyone, so we would appreciate your support (^-^) 👇Blog explanation version here: https://dslabblog.com/z-test/ ========================================= [Related Videos] ▼Hypothesis Testing. Why do we say "we cannot say that it is not"? What is a p-value?    • 統計的仮説検定。なぜ「ではないとは言えない」と表現するのか？p値とは？   ▼Must-see! An incredibly easy-to-understand explanation of how to read a standard normal distribution table!    • 必見！標準正規分布表の見方が面白いほどよくわかる解説！   ▼An easy-to-understand explanation of the t-test. Why are degrees of freedom relevant? What is the meaning of calculating the t-value?    • t検定のわかりやすい解説。なぜ自由度が関係するのか？t値の計算の意味は？   ▼A video that deepens your understanding of the effectiveness of standardizing the normal distribution through the concept of "standard score".    • 『偏差値』の考え方を通して、正規分布の標準化の有効性の理解を深めることができる動画。   ▼Interval estimation of the population mean (population variance known). What is interval estimation? What is the meaning of a confidence interval?    • 母平均の区間推定（母分散既知）。区間推定とは？信頼区間の意味は？   ========================================== Subscribe to our channel here ☞   / @datasciencelab.   #Explained by a QC Certification Level 1 Achiever