Mary alice is trying to answer the question. how many siblings does each member of her 30 person biology class have. what is the best way to determine this? a) take a sample of 10 members of the class and then find the mean of the responses. b) survey each member of her 30 person class to determine how many siblings each person has. c) take a survey from the entire school and then look at the responses from students in a biology class. d) look at the school enrollment roster to see how many siblings each member of the class has at the school.

An engineer is going to redesign an ejection seat for an airplane. the seat was designed for pilots weighing between 120 lb and 161 lb. the new population of pilots has normally distributed weights with a mean of 125 lb and a standard deviation of 28.1 lb. a)if a pilot is randomly selected, find the probability that his weight is between 120 lb and 161 lb. the probability is approximately? b. if 36 different pilots are randomly selected, find the probability that their mean weight is between 120 lb and 161 lb. the probability is approximately? c. when redesigning the ejection seat, which probability is more relevant? . part (b) because the seat performance for a single pilot is more important. b. part (b) because the seat performance for a sample of pilots is more important. c. part (a) because the seat performance for a sample of pilots is more important. d. part (a) because the seat performance for a single pilot is more important.