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

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.The 90% confidence interval for the population mean rod length is ______________.

A) 19,365 to 20,635
B) 19,367 to 20,633
C) 19,514 to 20,486
D) 19,515 to 20,485
E) 18,500 to 21,500