What Is the 90% Confidence Interval for the Variance of Exam

question 11

Multiple Choice

What is the 90% confidence interval for the variance of exam scores for 28 algebra students, if the standard deviation of their last exam was 12.7?

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Definitions:

Reading Skills

The abilities that enable an individual to decode written text, comprehend it, and derive meaning from it.

Multiple Perspectives

The consideration or analysis of a situation, problem, or concept from various viewpoints to gain a comprehensive understanding.

Phonological Awareness

The recognition and understanding of the sound structure of language, including the ability to manipulate sounds.

Syllables

Units of organized sequential sounds in spoken language, serving as the building blocks of words.