A random variable X is exponentially distributed with an expected value of 68.
a-1. What is the rate parameter A? (Round your answer to 3 decimal places.)
Rate parameter
a-2. What is the standard deviation of X?
Standard deviation X
b. Compute 264 s XS 72). (Round intermediate calculations to at least 4 decimal places and final answer to 4 decimal places.)
P(64 SX S72)