A researcher wishes to estimate the proportion of adults who have high-speed Internet access. What size sample should be
obtained if she wishes the estimate to be within 0.03 with 99% confidence if
(a) she uses a previous estimate of 0.54?
(b) she does not use any prior estimates?

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 (%).