I need to correct question and explain what I did wrong.

2. Multnomah county recorded the following probabilities for the number of accidents per day on a certain freeway for one month. The number of accidents per day and their corresponding probabilities are shown below. Find the mean, variance, and standard deviation. X 0 2 3 4 P(X) 0.4 0).2 0.2 0).1 0.1 mean = 1.3 variance = 1.82 1 stand and clev = 1. 345 3. Based on data from a USA Today Snapshot. 72% of adults have security concerns about online banking. Suppose 30adults are randomly selected. a.) State the distribution, the parameters and the support of the distribution. binonAtal , X= 0, 1, 9..30 , clistrib Is a binomial because we are given a probability . and a sample space b.) Find the probability that 20 of the adults have security concerns about online banking. p /zo ) = binomial calf ( n = 30 , p = $ 72 , x = 20 ) x = 6, 1, 2n30 P ( x = 20 ) - 10-319 4 c.) Find the probability that more than 16 of the adults have security concerns about online banking. * = 6, 1 12 , .. . 16 P ( x > 16 ) = 1 - P ( x