To investigate an alleged unfair trade practice, the FTC takes a random sample of 16 "5-ounce" candy bars. The mean of the sample weights is 4.85 ounces, and the sample standard deviation is 0.1 ounce. Test the hypotheses: H0 : μ ≥μ≥ 5 Ha : μμ < 5 At the 5% significance level. Assume the population of candy bar weights is approximately normally distributed. Bases on the results, does the FTC have grounds to proceed against the manufacturer for unfair practice of short-weight selling?