Help!!!

The following frequency distribution summarizes the weights of 195 fish caught by anglers participating in a professional bass fishing tournament. Weight ( Pounds ) Frequency 1-3 57 4-6 29 7-9 100 10-12 9 (a) Calculate the (approximate) sample mean for these data. (Round your answer to 2 decimal places.) X . . . . 5.94 : Ibs (b) Calculate the (approximate) sample variance for these data. (Round your answer to 3 decimal places.) S12 mmmmmm