ASAP or when any one can
The life spans of gorillas in a particular zoo are normally distributed. The average gorilla lives 20 years with a standard deviation of 2.1 years. Find a range of gorillas' life spans which lies within 2 standard deviation, about 95%
Between 15.8 and 24.2 years
Between 17.9 and 22.1 years
Between 13.7 and 26.3 years
Between 13.7 and 22.1 years