The sample average weight of 26 pregnant women in a local community is 110 lbs with a standard deviation of 10 lbs. A census has revealed that national average weight for pregnant women is 100 lbs. Compute the test statistic to test if the average wight among pregnant women in the local community differs from that of the national average. 3.162... Calculate the minimum sample size to compute a 95% confidence interval for the true mean weight of pregnant women in that community correct to within 3 lbs