When Figuring the Pooled Population Variance Estimate in a T

question 1

Multiple Choice

When figuring the pooled population variance estimate in a t test for independent means,

• A)the variance of at least one of the original populations must be known,as opposed to estimated,but the other can be estimated from sample scores.
• B)the variance of BOTH of the original populations must be known,as opposed to estimated.
• C)the estimates based on each of the samples are averaged in such a way as to give more influence to the estimate based on more participants.
• D)the scores from both samples are combined to form a single sample,and the estimated variance is figured in the usual way using this combined sample.

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Definitions:

Infant's Pulse

The measurement of the number of heartbeats per minute in an infant, an important indicator of cardiovascular health.

Counting Respirations

The act of measuring the number of breaths taken by a person within a specified period of time.

Patient Knowing

The comprehension or understanding that a patient has regarding their health, treatment options, and the implications of those treatments on their life.

Pulse Pressure

Difference between the systolic and diastolic pressures, normally 30 to 40 mm Hg.