The Root of a Tooth Is Covered by

question 13

Multiple Choice

The root of a tooth is covered by

• A)enamel.
• B)cementum.
• C)dentin.
• D)pulp.
• E)the root canal.

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Definitions:

Wilcoxon Rank-sum Test

A nonparametric test used to assess whether there is a significant difference between two independent samples based on median comparison.

Kruskal-Wallis Test

A nonparametric statistical test used to compare three or more groups or samples that do not meet the assumption of normality.

Left-tailed Wilcoxon Rank Sum Test

A nonparametric test used to assess whether one of two groups of independent samples tends to have lower values than the other.

Test Statistic

A calculated value from sample data used to test a hypothesis against a null hypothesis.