The average weight of a package of rolled oats is supposed to be at least 18 ounces. A sample of 18 packages shows a mean of 17.78 ounces with a standard deviation of 0.41 ounce. (a) At the 5 percent level of significance, is the true mean smaller than the specification? Clearly state your hypotheses and decision rule. a. H0: μ ≥ 18. Reject H0 if tcalc > –1.74 b. H1: μ < 18. Reject H1 if tcalc < –1.74 c. H0: μ ≥ 18. Reject H0 if tcalc < –1.74 d. H1: μ < 18. Reject H1 if tcalc > –1.74 a b c d (b) If α = .01, we would have a. failed to reject the null hypothesis. b. rejected the null hypothesis. a b (c) Use Excel to find the p-value. (Round your answer to 4 decimal places.) p-value