A processor of carrots cuts the green top off each carrot, washes the carrots, and inserts six to a package. Twenty packages are inserted in a box for shipment. To test the mass of the boxes, a few were checked. The mean mass was 9.3 kg, and the standard deviation was 0.26 kg. How many boxes must the processor sample to be 95% confident that the sample mean does not differ from the population mean by more than 0.14 kg? (Round the intermediate calculation to 2 decimal places. Round the final answer to the nearest whole number.) Sample sizeThe estimate of the population proportion is to be within plus or minus 0.05, with a 80% level of confidence. The best estimate of the population proportion is 0.13. How large a sample is required? (Round the final answer to the nearest whole number. Round the intermediate calculation to 2 decimal places. ) Sample sizeThere are 350 welders employed at the Weller Shipyards Corporation. A sample of 50 welders revealed that 41 had graduated from a registered welding course. Construct the 95% confidence interval for the proportion ofall welders who graduated from a registered welding course. {Round the final answers to 3 decimal places.) The confidence interval is between and |