Statistics and Probability

Select the question wether True - False.

1- Consider two designs. If the safety factor of design A is less than that of design B, then the

failure probability of design A is always smaller than that of design B.

2- Safety factor is not the ratio of the design strength over the design load.

3- Safety factor is not the ratio of the mean strength over the mean load.

4- Reliability-based design is not easier than reliability analysis.

5- Human error decreases reliability.

The probability density function of the failure time fr(t) is not equal to the probability of failure

of the system at time t.

6- The probability density function of failure time is not always less than or equal to one.

7- The cumulative distribution function of the failure time, Fr(t), is not always less or equal to one.

8- The area under the cumulative distribution function is not always one

Solve the question with the correct answer and proper explanation please that I can understand the concept please...!

It is important for me please...!