The weights of the bags are normally distributed. It has been calculated that 99.7% of the bags fall between 24.28kg and 25.72 kg. What is the standard deviation of the data?

Question

A volunteer group is packaging bags of rice to send to a foreign country. The weights of the bags are normally distributed. It has been calculated that 99.7% of the bags fall between 24.28kg and 25.72 kg. What is the standard deviation of the data?

Answer 1

99.7% is six standard deviations (look at a normal curve)