Two Independent Samples of Sizes 25 and 35 Are Randomly

question 50

Multiple Choice

Two independent samples of sizes 25 and 35 are randomly selected from two normal populations with equal variances (assumed to be unknown) .In order to test the difference between the population means,the test statistic is:

• A)a standard normal random variable.
• B)approximately standard normal random variable.
• C)Student t-distributed with 58 degrees of freedom.
• D)Student t-distributed with 33 degrees of freedom.

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Definitions:

Articular Cartilage

A soft, white layer that envelopes the extremities of bones at their junctures, diminishing friction and soaking up impact.

Fibrous Capsule

A dense connective tissue layer that encloses certain organs, providing protection and structural support.

Medial Meniscus

A C-shaped cartilage located in the knee, playing a critical role in stabilizing and cushioning the joint.

Autoimmune Disease

A condition arising from an abnormal immune response to a normal body part, leading to inflammation and damage.