To Minimize Image Distortion,the

question 6

Multiple Choice

To minimize image distortion,the:

• A)film must be positioned perpendicular to the long axis of the tooth.
• B)film must be positioned parallel to the long axis of the tooth.
• C)central ray of the x-ray beam must be directed parallel to the film.
• D)central ray of the x-ray beam must be directed parallel to the long axis of the tooth.

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Definitions:

Yates' Correction

A statistical procedure applied to the chi-squared test for 2x2 contingency tables to correct for the discontinuity error.

Expected Frequencies

Quantitative descriptions of the number of occurrences of events expected to happen in a scientific experiment based on probability distributions.

Fisher's Exact Test

A statistical significance test used to examine the association between two categorical variables in a contingency table, especially useful for small sample sizes.

Yates' Correction

A statistical adjustment made to the chi-squared test for small sample sizes, to better approximate the chi-squared distribution.