For Statistical Inference About the Mean of a Single Population

question 85

Multiple Choice

For statistical inference about the mean of a single population when the population standard deviation is unknown,the degrees for freedom for the t-distribution equal n -1 because we lose one degree of freedom by using the:

• A) sample mean as an estimate of the population mean.
• B) sample standard deviation as an estimate of the population standard deviation.
• C) sample proportion as an estimate of the population proportion.
• D) sample size as an estimate of the population size.

---

Definitions:

Echoic Memory

A subtype of sensory memory that retains auditory information, allowing sounds to be remembered for a short period after they are heard.

Auditory Impression

The perception or interpretation of sounds by the brain, including how noises, music, and speech are heard and understood.

Procedural Memories

Memories of how to perform tasks or actions, such as riding a bike or swimming, that are usually recalled without conscious effort.

Implicit Memories

Memories that are formed and used unconsciously and can affect thoughts and behaviors without an individual's awareness.