Case 12-1 Casey Is Using XML to Store Information About the Students

question 82

Multiple Choice

Case 12-1
Casey is using XML to store information about the students in the science classes that he teaches. He wants to design a DTD that he can use to validate the XML documents that he uses for this purpose, and he comes to you for help.

-After you teach Casey about declarations for elements with child elements, he constructs the element declaration <!ELEMENT class ((seminar | lesson | workshop) , time?) >.Given this declaration, which of the following is NOT a valid "class" element?

• A) <class><seminar>Beginner Drawing</seminar><time>Mon. 3-4</time></class>
• B) <class><lesson>One-on-One Painting</lesson><time>Tues. 11-noon</time></class>
• C) <class><seminar>Oil Painting</seminar><lesson>brushstrokes</lesson></class>
• D) <class><workshop>Working with Clay</workshop></class>

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Definitions:

Normally Distributed

Describes a distribution that is symmetric around the mean, showing that data near the mean are more frequent in occurrence than data far from the mean.

Sample Sizes

Sample sizes refer to the number of observations or units chosen from a population for the purpose of statistical analysis.

Normal Approximation

Normal approximation is a statistical technique that involves using the normal distribution to approximate the distribution of sample means or sums, especially useful for large sample sizes.

Standardized Test Statistic

A measure used in statistical hypothesis testing, indicating how far a sample statistic deviates from its null hypothesis expected value, typically expressed as a z-score.