p-value: probability of observing an outcome which is at least as hostile (or adversarial) to the null hypothesis as the one observed
Null hypothesis: mean lifetime of a manufacturing device = 9.4 years
Accepted: within 0.396 units
50 elements with sample mean of 8.96
What is the probability that when we generate a different and independent sample average of 50 observations, we get the value <8.96 if the null hypothesis is true?
Worse than 8.96
1. Getting a number smaller than 8.96
2. Getting a number larger than 9.84
Conclusion: the larger the p-value, the stronger the evidence supporting the hypothesis.