Aconsumer advocacy group suspects that a local supermarket’s 10-ounce packages of cheddar cheese actually weigh actually less than 10 ounces. the group took a random sample of 20 such packages and found that the mean weight for the sample was 9.955 ounces. the population follows a normal distribution with the population standard deviation of o.15 ounce. does this data support the consumer advocacy group’s suspect? using level of significance = 0.02, carry out a hypothesis test