Freight car loadings over an 18-week period at a busy port are as follows: Week Number Week Number Week Number 1 380 7 450 13 655 2 385 8 500 14 665 3 390 9 550 15 715 4 385 10 545 16 720 5 390 11 595 17 725 6 400 12 645 18 730 Click here for the Excel Data File a. Determine a linear trend line for expected freight car loadings. (Round your intermediate calculations and final answers to 2 decimal places.)

You were told that the amount of time lapsed between consecutive trades on the new york stock exchange followed a normal distribution with a mean of 15 seconds. you were also told that the probability that the time lapsed between two consecutive trades to fall between 16 to 17 seconds was 13%. the probability that the time lapsed between two consecutive trades would fall below 13 seconds was 7%. what is the probability that the time lapsed between two consecutive trades will be between 14 and 15 seconds?