A machine has three components A, B and C. The probability of A working is 7/10. If A is working, the probability of B working i
s 1/3 . If A is not working, then the probability of B working is 1/3. If A and B are working, the probability of C working is 5/6, otherwise it is 1/10 . The machine only works if C is working
A 95% confidence interval is a range of values that you can be 95% certain contains the true mean of the population. ... The 95% confidence interval defines a range of values that you can be 95% certain contains the population mean.
