do ship rankers use standard deviation or mean what is the standard deviation for the rv ranking method how to make mean and standard deviation in statistics what are the standard deviation for a class of ships to a category can you rank two different categories of ships how to do rank for a class how to rank two categories what is standard deviation for a ship classification do you need to rank a class of rv for each month can standard deviation vary for a class of a ship how many ships does it take to rank a vessel how do i rank ships when to use standard deviation how should ranked ships be based on standard deviation how to rank 2 different categories of ships does average burn time for a month change can you rank two different types of ships by standard deviation or annual change how to make the burn rate standard deviation what is the optimum formula for calculating the mean standard deviation of a ship in a class how do i calculate the averages for each category