Apopular weight-loss company advertises that those who join will lose, on average at least 10 pounds in the first 2 weeks. to check the claim, a random sample of 35 customers was taken and it showed a sample mean weight loss of 8.75 pounds. assume that the population standard deviation of weight loss is 2.8 pounds. at a 1% level of significance, test to see if the company’s claim is valid. what is your conclusion?