A machine poured melted chocolate into moulds. The standard deviation of the amount it pours is 0.7 grams, and the mean amount can be set on the machine.
A machine poured melted chocolate into moulds. The standard deviation of the amount it pours is 0.7 grams, and the mean amount can be set on the machine. The amount poured may be assumed to follow a normal distribution. The machine is to produce bars whose label says 50 g of chocolate. The company’s lawyers want to have no more than 0.5% of bars containing less than the advertised weight. What should the mean be set at?
| A. 52.0 g | C. 51.8 g |
| B. 52.2 g | D. 51.6 g |