Abstract
The standard university course of statistics
is as follows:

In the previous chapter, we are concerned with ① (inference) in quantum language. In this chapter, we devote ourselves to ② and ③ (confidence interval and statistical hypothesis testing).
However, note that we are not concerned with
"null hypothesis vs. alternative hypothesis" and "one-sided test and two-sided test"

**Again recall that, as mentioned in $\S$1.1, the main purpose of this book is to
assert the following figure 1.1:**
**Fig.1.1: the location of "quantum language" in the world-views**
This(particularly, ⑦--⑨) implies that quantum language has the following three aspects:
$$
\left\{\begin{array}{ll}
\mbox{ ⑦ :the standard interpretation of quantum mechanics}
\\
\mbox{
$\qquad$
(i.e., the true colors of the Copenhagen interpretation)
}
\\
\\
\mbox{ ⑧ :
the final goal of the dualistic idealism (Descartes=Kant philosophy)
}
\\
\\
\mbox{ ⑨ :
theoretical statistics of the future
}
\end{array}\right.
$$