Aconsumer protection group randomly checks the volume of different beverages to ensure that companies are packaging the stated amount. each individual volume is not exact, but a volume of iced tea beverages is supposed to average to 300 ml with a standard deviation of 3 ml. the consumer protection group sampled 20 beverages and found the average to be 298.4 ml. which of the following is the most restrictive level of significance on a hypothesis test that would indicate the company is packaging less than the required average 300 ml?
1%
2.5%
5%.
10%