Every morning, Alpha Corporation receives a shipment of flour from their supplier. The flour is packaged in 40 kg bags, and any shipping that is more than 4% underweight will be rejected by Alpha. For each package, the foreman samples 40 bags, and if the bags average more than 4% underweight, the whole shipment is returned to the seller. Calculate the magnitude of the proportion's normal error.

Multiple-choice questions

• 0.03098
• 0.00096
• 0.00064
• 0.0250
• 0.02771