The Problem of Losing Desired Information from a Database When

question 24

Multiple Choice

The problem of losing desired information from a database when an unwanted record is purged from the database is referred to as the ________ anomaly.

• A)purge
• B)erase
• C)delete
• D)integrity

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Definitions:

Alternative Hypothesis

In statistical hypothesis testing, a statement that contradicts the null hypothesis, suggesting that there is a statistically significant difference between observed data and the expected outcome under the null hypothesis.

Two-tail Test

A statistical test in which the critical area of a distribution is two-sided and tests whether a sample is either greater than or less than a range of values.

Nominal Data

Data that represents categories with labels or names, where the order of the categories is not meaningful.

Z-test

A statistical test used to determine whether two population means are different when the variances are known and the sample size is large.