Question

In Applied Life Data Analysis (Wiley, 1982), Wayne Nelson presents the breakdown time of an insulating fluid between electrodes at 34kV. The times, in minutes, are as follows:
0.20, 0.74, 0.99, 1.35, 2.84, 3.13, 4.26, 4.65, 4.83, 6.42, 7.41, 8.06, 8.28, 12.84, 31.55, 32.60, 33.83, 36.88, and 72.80.
Calculate the sample mean and sample deviation of the breakdown data.

Round your answers to 2 decimal places.

Mean =		minutes
Standard Deviation =		minutes

Answer 1

Calculate the sample mean and sample deviation of the breakdown data.

Mean = 14.40 minutes

Standard Deviation = 18.86 minutes

Formula Reference: