Meg conducted a survey of four school cafeterias to find the number of students who like sandwiches for lunch. the results of her survey are recorded in the table below: school cafeteria survey school total number of students in the cafeteria number of students who liked sandwiches a 38 12 b 48 9 c 26 10 d 24 8 which school has the greatest percentage of students who like sandwiches for lunch?

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.