ect... X1 bank - Math 251, S... 4. [-/1 Points] DETAILS x Review 2 - Math 251, s... LAROSESTAT3 5.4.018. MY NOTES Find the value of the factorial. ASK YOUR TEACHER PRACTICE ANOTHER 5. [-/1 Points] DETAILS LAROSESTAT3 6.1.010. MY NOTES ASK YOUR TEACHER Indicate whether the variable is a discrete or continuous random variable. how hot it will be the next time you visit the beach discrete random variable continuous random variable 6. [-/1 Points] DETAILS DIEZSTAT4 4.3.018. MY NOTES ASK YOUR TEACHER PRACTICE ANOTHER The National Vaccine Information Center estimates that 90% of Americans have had chickenpox by the time they reach adulthood. (a) Suppose we take a random sample of 80 American adults. Is the use of the binomial distribution appropriate for calculating the probability that exactly 75 out of 80 randomly sampled American adults had chickenpox during childhood. Explain. The trials (-Select- independent from one another. The number of trials Select- fixed. There are -Select- possible outcomes for each trial. The probability of a success ---Select--- the same for each trial. Therefore, the binomial distribution ---Select-- be used. (b) Calculate the probability that exactly 75 out of 80 randomly sampled American adults had chickenpox during childhood. (Round your answer to four decimal places.) (c) What is the probability that exactly 5 out of a new sample of 80 American adults have not had chickenpox in their childhood? (Round your answer to four decimal places.) (d) What is the probability that at least 1 out of 20 randomly sampled American adults have had chickenpox? (Round your answer to four decimal places.) (e) What is the probability that at most 3 out of 20 randomly sampled American adults have not had chickenpox? (Round your answer to four decimal places.) You may need to use the appropriate technology to answer this