What is the best estimate of the true mean for the spring constant and its corresponding confidence interval (95% probability)?
A) 20 N/m, (18 N/m, 22 N/m)
B) 25 N/m, (23 N/m, 27 N/m)
C) 18 N/m, (20 N/m, 22 N/m)
D) 30 N/m, (28 N/m, 32 N/m)