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.

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