Animal # of Blood Types Pig 16 Cow 12 Chicken 11 Horse 9 Human 8 Sheep 7 Dog 7 Rhesus Monkey6 Mink 5 Rabbit 5 Mouse 4 Rat 4 Cat 2 Find the mean Find the variance and standard deviation of this data. How many of these animals have blood types that are within 1 standard deviation of the mean? Solution mean = 11 var = 5.2 4.