​Two Separate Samples Are Being Used to Estimate the Difference

question 66

Multiple Choice

​Two separate samples are being used to estimate the difference between population means for two treatment conditions.Which of the following would produce the widest confidence interval?

• A)​n₁ =n₂ = 10 with a pooled variance of 10
• B)​n₁ =n₂ = 10 with a pooled variance of 100
• C)​n₁ =n₂ = 20 with a pooled variance of 10
• D)​n₁ =n₂ = 20 with a pooled variance of 100

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Definitions:

Brachial

Refers to the brachial artery in the arm; the artery used in measuring blood pressure.

Radial

Refers to structures arranged like rays that extend from or converge to a common center, often used in anatomical contexts.

Carotid

Pertaining to the carotid artery.

Carotid

Referring to the main arteries in the neck that supply blood to the head and brain.