Two samples of electronic components were tested in two different testing conditions see results below. The first test at 353K was suspended after 250 hrs. Estimate the 90% two sided intervals for the MTTF for each of the temperatures. Also estimate the one sided confidence interval for the MTTF for both 90% and 95% confidence. Based on the one-sided values, find the reliabilities at 100 hrs for both confidences and temperatures, assuming constant failure rate (4 values).

353(80 degrees C )

55h	FAIL
63h	FAIL
80h	FAIL
209h	FAIL
250h	SUSPENDED

373k (100 degrees C)

13h FAIL 15h FAIL 30h FAIL 41h FAIL 57h FAIL 93h FAIL 109.9h FAIL