A computer component life test of four randomly selected modems had failure times of 1.2, 2.7, 3.4, and 5.1 years

1. Create a Weibull probability plot
2. Determine when 25% of the population will fail
3. Determine the shape and scale parameters of the distribution.
4. State the most likely failure mode (ie. early-life, intrinsic, or wear-out) and explain your reasoning.