Group 1 Has a Mean of 13

question 45

Multiple Choice

Group 1 has a mean of 13.4 and group 2 has a mean of 15.2. Both populations are known to have a variance of 9.0 and each sample consists of 18 items. What is the test statistic to test for equality of population means?

• A)-1.755
• B)-1.643
• C)-1.800
• D)-1.285

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Definitions:

Recognize

The ability to identify or acknowledge something as previously known, seen, or experienced, often by perception or cognition.

Visual Image

A representation of the external environment perceived by the visual system, formed in the brain.

Pain Impulses

Nerve signals that transmit the sensation of pain from the body to the brain.

Eyes

Organs of vision that detect light and convert it into electro-chemical impulses in neurons, facilitating sight.