Crackers: Boxes of crackers are filled by a machine. The weights of a random sample of 25

Question:

Crackers: Boxes of crackers are filled by a machine. The weights of a random sample of 25 boxes of crackers have standard deviation s = 5 grams. Assume the weights are normally distributed. Can you conclude that the population standard deviation is less than 10 grams? Use the a = 0.05 level of significance.