When Two Population Variances Are ____________________ We Estimate Each Population

question 12

Short Answer

When two population variances are ____________________ we estimate each population variance with its sample variance. The test statistic of is approximately Student t -distributed with n ₁ + n ₂ - 2 degrees of freedom.

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Definitions:

Diaphragm

A large, dome-shaped muscle located below the lungs that plays a key role in breathing by contracting and relaxing to alter the size of the thoracic cavity.

Dorsal Respiratory Group

A cluster of neurons located in the medulla oblongata that controls the basic rhythm of respiration through the regulation of inspiratory depth and rate.

Phrenic Nerve

Nerve derived from spinal nerves C3–C5; supplies the diaphragm.

Glossopharyngeal Nerve

A cranial nerve that is responsible for taste and other functions of the throat.