The historical data of Velvetta Inc a healthcare products

Last updated: 3/2/2023

The historical data of Velvetta Inc a healthcare products manufacturer have shown that in a production process for filling bottles of shampoo variance in the volume is constant however clogs in the filling machine often affect the mean volume The historical standard deviation is 5 milliliters In filling 250 milliliter bottles a sample of 20 found a mean volume of 242 milliliters A B Velvetta Inc Shampoo Production 2 Alpha Value 3 Standard Deviation 4 Sample Size 5 Sample Mean What is the lower confidence interval estimate at a confidence level of 95 239 81 O 240 16 0 05 5 20 242 O 240 04