Answer Happy

1.) What are the mean and standard deviation if you randomly guess on a true/false test that has 18 questions? Round to one decimal place as needed. 2 pts 2.) If the probability of being a smoker is 14% and you look at a group of 8 students, what is the probability that exactly 3 are smokers?. 2 pts 3.) If the probability of earning an A on the test is 22%, what is the probability that at least 5 of 13 randomly selected students earned an A? 3 pts 4.) If the probability of earning a Con the test is 27%, what is the probability that less than 4 of 14 randomly selected students earned a C? 3 pts