In a Hearing Test, Randomly Selected Subjects Estimate the Loudness

question 139

Multiple Choice

In a hearing test, randomly selected subjects estimate the loudness (in decibels) of a sound, and the results are (mean = 70) : 68, 67, 70, 71, 68, 75, 68, 62, 80, 73, 68. What is the variance?

• A) 18
• B) 4.73
• C) 22.40
• D) 324
• E) 6.76

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Definitions:

Null Hypothesis

A statement of no effect or no difference, which serves as the default assumption to test against in hypothesis testing.

Proportions

A statistical measure that indicates the relative size of one number to another, often expressed as a fraction or percentage.

Student Attitude

The predispositions or tendencies of students towards learning, school activities, and education in general, which can influence their academic performance.

Dormitory Regulations

Rules and guidelines set by an institution to manage behavior and ensure the safety and well-being of students living in dormitory accommodation.