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Pollsters are concerned about declining levels of cooperation among persons contacted in surveys. A pollster contacts 105 people in the 18-21 age bracket and finds that 89 of them respond and 16 refuse to respond. When 235 people in the 22-29 age bracket are contacted, 210 respond and 25 refuse to respond. Assume that 1 of the 340 people is randomly selected. Find the probability of getting someone in the 18-21 age bracket or someone who refused to respond. Report the answer as a percent rounded to one decimal place accuracy. You need not enter the "%" symbol. P(18-21 or refused) = 38.24X Pix) 0. 1 1 0.2 2 0. 15 3 0.55 Find the mean of this probability distribution. Round your answer to one decimal place.X Pixi 0 0.1 1 0.25 2 0.3 3 0.35 Find the standard deviation of this probability distribution. Give your answer to at least 2 decimal placesIf a seed is planted, it has a 65% chance of growing into a healthy plant. If 8 seeds are planted, what is the probability that exactly 3 don't grow?A poll is given, showing 65% are in favor of a new building project. If 8 people are chosen at random, what is the probability that exactly 7 of them favor the new building project?bout 5% of the population has a particular genetic mutation. 500 people are randomly.r selected. Find the standard deviation for the number of people with the genetic mutation in such groups of 500. Assume that a procedure yields a binomial distribution with a trial repeated n = 14 times. Use either the binomial probability formula (or technology) to find the probability of * = 2 successes given the probability p = 20 % of success on a single trial. (Report answer accurate to 4 decimal places.) P( X = k) =Assume that a procedure yields a binomial distribution with n = 1055 trials and the probability of success for one trial is p = 0.76. Find the mean for this binomial distribution. (Round answer to one decimal place. ) A = Find the standard deviation for this distribution. (Round answer to two decimal places. ) 7 = Use the range rule of thumb to find the minimum usual value p-26 and the maximum usual value p+26. Enter answer as an interval using square-brackets only with whole numbers. usual values =United Airlines' flights from Boston to Atlanta are on time 60 % of the time. Suppose 14 flights are randomly selected, and the number on-time flights is recorded. 1. The probability that at least 2 flights are on time is = 2. The probability that at most 9 flights are on time is = 3. The probability that exactly 7 flights are on time is =According to a study, 70 % of adult smokers started smoking before 21 years old. 11 smokers 21 years old or older are randomly selected, and the number of smokers who started smoking before 21 is recorded. 1. The probability that at least 4 of them started smoking before 21 years of age is 2. The probability that at most 8 of them started smoking before 21 years of age is 3. The probability that exactly 7 of them started smoking before 21 years of age isIn analyzing hits by bombs in a past war, a city was subdivided into 450 regions, each with an area of 0.5-miz. A total of 400 bombs hit the combined area of 450 regions. The Poisson distribution applies because we are dealing with the occurrences of an event (bomb hits) over some interval (a region with area of 0.5-miz. Find the mean number of hits per region: mean = Find the standard deviation of hits per region: standard deviation = If a region is randomly selected, find the probability that it was hit exactly twice. [ Report answer accurate to 4 decimal places.) P(X = 2) = Based on the probability found above, how many of the 450 regions are expected to be hit exactly twice? [Round answer to a whole number.) ans = If a region is randomly selected, find the probability that it was hit at most twice. [Report answer accurate to 4 decimal places.) P(X