Questions 3-13 are related to the following probability distribution. The table shows the probability distribution of the number of days (x) to complete a construction project by a contractor. X f (x) 0.037 WNA 0.138 0.311 0.187 0.047 3 The probability that the project will be finished in 3 days is a 0.280 0.269 0.258 0.248 4 Ef (x) = a 1.04 1.02 1.00 0.98 5 The probability that it will take more than 2 days to complete the project is 0.902 0.876 0.850 0.8256 The probability that it will take at most 3 days to complete the project is 0.466 0.455 0.444 0.433 7 The expected value of the days to finish the project is 3.614 3.526 3.440 3.356 8 The variance of the days to complete the project is 1.502 1.391 1.288 1.193 9 The standard deviation of the days to complete the project is 1.376 1.274 1.179 1.092 10 If you added 2 days to each value in the Days (x) column, the expected value of days to completion will be 5.333 5.614 5.909 6.22012 sir-acre: 13 QnU'm If you doubled each number of days to completion in the Days {31:} column, the expected value of days to completion will be 7.228 7.608 3.008 8.429 If you doubled each number of days to completion in the Days {31:} column, the variance of days to completion will be 2.732 3.286 5.564- 6.857