View Policies Current Attempt in Progress A manufacturing plant produces steel rods. During one production run of 20,000 such rods, the specifications called for rods that were 46 cm in length and 3.8 cm in width. Fifteen of these rods making up a random sample were measured for length; the resulting measurements are shown here. Use these data to estimate the population variance of length for the rods. Assume rod length is normally distributed in the population. Construct a 99% confidence interval. Discuss the ramifications of the results. 44 cm 47 cm 43 cm 46 cm 46 cm 45 cm 43 cm 44 cm 47 cm 46 cm 48 cm 48 cm 43 cm 44 cm 45 cm (Round your answers to 2 decimal places, e.g. 1.75.) Appendix A Statistical Tables e Textbook and Media