A Researcher Is Interested in Estimating the Mean Weight of a Semi

question 52

Multiple Choice

A researcher is interested in estimating the mean weight of a semi tracker truck to determine the potential load capacity.She takes a random sample of 17 trucks and computes a sample mean of 20,000 pounds with sample standard deviation of 1,500.She decides to construct a 98% confidence interval to estimate the mean.The degrees of freedom associated with this problem are _______.

• A) 18
• B) 17
• C) 16
• D) 15
• E) 20

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