Exhibit 18-2
Consider the following time series. 
-Refer to Exhibit 18-2. The forecast for period 10 is
Definitions:
Equality Sign
A symbol used in mathematics to indicate that two expressions on either side of the sign are equal in value.
Type I Error
The mistake of rejecting the null hypothesis when it is actually true, falsely indicating a significant effect or difference.
Type II Error
A Type II error occurs when a statistical test fails to reject a false null hypothesis, mistakenly accepting a false premise.
Quality Control
The process of ensuring the standards and requirements of products or services are met through consistent measurements and testing.
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