A random sample of n = 15 heat pumps of a certain type yielded the following observations on lifetime (in years): 2.0 1.1 6.0 1.7 5.3 0.4 1.0 5.3 15.7 0.9 4.8 0.9 12.2 5.3 0.6 (a) Assume that the lifetime distribution is exponential and use an argument parallel to that of this example to obtain a 95% CI for expected (true average) lifetime. (Round your answers to two decimal places.) What is a 95% CI for the standard deviation of the lifetime distribution? [Hint: What is the standard deviation of an exponential random variable?] (Round your answers to two decimal places.) NOTE: DON'T COPY FROM OTHER SOURCES PLEASE SEND ME ANSWER IN TYPED FORM STRICTLY PROHIBITED HAND WRITTEN SOLUTION AND SEND ME FINALLY ANSWER SEPRATELY