Plz help meh it’s multiple choice but I’m stuck T-T

Glaucoma is an eye disease that is manifested by high intraocular pressure (iop). the distribution of iop measurements in the general population is approximately normal with mean 16 mm hg and standard deviation 3 mm hg. a random sample of 9 people is selected from the general population. the sample mean iop is 17.2 mm hg with a sample standard deviation of 3.9 mm hg. a) the mean of the sampling distribution of x is 16 mm hg. b) the standard deviation of the sampling distribution of x is 1.3 mm hg. c) the sample mean of every sample of size 9 will be 17.2 mm hg d) none of the answers are true. e) exactly 2 of the answers are true.

Ireally need to know this answer asap

Does the weight loss program have practical significance? a. no, the program is not practically significant because the results are likely to occur even if the weight loss program has no effect. b. yes, the program is practically significant because the results are too unlikely to occur by chance. c. yes, the program is practically significant because the amount of lost weight is large enough to be considered practically significant. d. no, the program is not practically significant because the amount of weight lost is trivial.