Concept:
In logical reasoning, a conclusion follows only when it is directly supported by the given statements.
We cannot introduce new information that is not contained in the statements.
Step 1: Examine Conclusion I.
Statement I says:
\[
\text{Statistics is a process of data analysis.}
\]
However, Conclusion I adds:
\[
\text{decision-making}
\]
The idea of decision-making is not explicitly mentioned in the statements.
Therefore, Conclusion I does not logically follow.
Step 2: Examine Conclusion II.
Conclusion II states:
\[
\text{Statistics is a static process for mind.}
\]
Nothing in either statement suggests that statistics is static or related to the mind in this manner.
Hence Conclusion II also does not follow.
Step 3: Determine the final result.
Since neither conclusion can be derived directly from the given statements,
\[
\boxed{\text{Neither Conclusion I nor Conclusion II follows}}
\]
Hence,
\[
\boxed{\text{Option (D)}}
\]
is the correct answer.