Changes Made to a System to Evolve Its Functionality to Changing

question 44

Multiple Choice

Changes made to a system to evolve its functionality to changing business needs or technologies best describes:

• A)corrective maintenance
• B)adaptive maintenance
• C)preventive maintenance
• D)perfective maintenance

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Definitions:

Contingency Table

A table used in statistics to display the frequency distribution of variables to show the relationship between them.

Level of Significance

The probability of rejecting the null hypothesis in a statistical test when it is in fact true; commonly set thresholds include 0.05 or 0.01.

Null Hypothesis

The null hypothesis is a statement or hypothesis that there is no significant difference or effect, typically to be tested against an alternative hypothesis.

Critical Value

The threshold in a statistical test such that if the calculated test statistic is beyond this point, the null hypothesis is rejected.