Calculate a 95% confidence interval for the mean starting salary of all employees who stay (Yes) at least three years with D&Y. What are the values of LCL and UCL? Round your answers to 2 decimal places. [Hint: First sort the dataset by the variable Stayed 3 years]

Acompany manufactures large valves, packed in boxes. a shipment consists of 1500 valves packed in 75 boxes. each box has the outer dimensions 1.2 x 0.8 x 1.6 m and the inner dimensions 1.19 x 0.79 x 1.59 m. the boxes are loaded on a vehicle (truck + trailer). the available capacity in the vehicle combination is 140 m3. each valve has a volume of 0.06 m3. - calculate the load factor on the box level (%). - calculate the load factor on the vehicle level (%). - calculate the overall load factor (%).