Chapter 6.7, Problem 6.102ACI

Jitter in a water power system. Jitter is a term used to describe the variation in conduction time of a water power system. Low throughput jitter is critical to successful waterline technology. An investigation of throughput jitter in the opening switch of a prototype system (Journal of Applied Physics) yielded the following descriptive statistics on conduction time for n = 18 trials: $\bar{x}=334.8$ nanoseconds, s = 6.3 nanoseconds, (Conduction time is defined as the length of time required for the downstream current to equal 10% of the upstream current.)

1. a. Construct a 95% confidence interval for the true standard deviation of conduction times of the prototype system.
2. b. Practically interpret the confidence interval, part a.
3. c. A system is considered to have low throughput jitter if the true conduction time standard deviation is less than 7 nanoseconds. Does the prototype system satisfy this requirement? Explain.