The Administrator of a College Is Concerned About the Students

question 74

Essay

The administrator of a college is concerned about the students using cell phones for texting during the class hours. She randomly selects 25 students to check if the variance of the number of students in the college using cell phones during the class hours is less than 12. She arrives at a sample variance of 7. She assumes the distribution to be normal.
A) State the appropriate null and alternative hypotheses for the test.
B) Compute the value of the test statistic.
C) Use the critical value approach to test the administrator's concern at α = 0.10.
D) Repeat the test at α = 0.01.

• A) State the appropriate null and alternative hypotheses for the test.
• B) Compute the value of the test statistic.
• C) Use the critical value approach to test the administrator's concern at α = 0.10.
• D) Repeat the test at α = 0.01.

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Definitions:

Tubular Reabsorption

The process by which the kidneys reclaim water and solutes from the tubular fluid and return them to the blood.

Nephron

The functional unit of the kidney, responsible for filtering blood and forming urine through processes of filtration, reabsorption, and secretion.

Filtered Molecules

Substances that have passed through a filtering process, often referring to molecules separated based on size or charge, especially in biological and chemical contexts.

Aging

A biological process involving the accumulation of changes in an organism over time, leading to a gradual decline in physiological functions and increased susceptibility to diseases.