Calculate the single-sided upper bounded 90% confidence interval for the population standard deviation (sigma) given that a sample of size n=10 yields a sample standard deviation of 8.14. Your answer: sigma < 11.35 sigma < 21.66 sigma < 8.53 sigma < 5.23 sigma < 8.07 sigma < 17.30 sigma < 23.69 sigma < 6.52 sigma < 18.93 sigma < 11.96