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

Question

Quizplus · Accepted Answer

The degrees of freedom for a t-distribution in this context is calculated as the sample size minus one, which is 17 - 1 = 16.

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