A public health screening survey provided the following data on the relationship between smoking and lung cancer. Determine the strength of the association between smoking and lung cancer by computing the relative risk of a smoker developing cancer. Calculate the 95% confidence interval around the relative risk to determine statistical significance. Is it significant?Data:Smoking status Lung cancer Total Present AbsentNon smoker 1 6700 6701smoker 20 3279 3299 Total 21 9979 10000

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.