1. A reliability test of 7 samples was run until all samples had failed. As each sample failed, it was taken out of the test (not replaced). The times to failure were (in hours): 150, 400, 500, 1000, 1500, 2000, 2500. Perform a data plot, using median ranking, on 2 cycle Weibull paper. What is the slope (B)? What is the scale factor (n)? What does the slope tell you about the failure rate? What does n represent (besides scale factor) with the data having the slope you just determined?

Fig: 1