a soft drink vendor claims that its process yields bottles with a mean internal strength of 157 phones for square and a standard deviation of 3 pounds with fear and is normally distributed as a part of its vendor surveillance a baudler strikes and agreement with the vendor that permits the butler to sample from the vendor production to verify the vendors claim support the bottlers randomly select 15 bottles to sample what is the mean and standard deviation. b) supposed it is normally distributed. what is the mean and standard deviation for 64 randomly selected bottles.​