7) In an effort to study the health of elephants in the wild, a researcher sampled the weight of baby elephants. She sampled 100 baby elephants and computed the average weight to be 900 pounds and the standard deviation to be 150 pounds.

a) What is the standard error of the weight of the baby elephants

b) Describe the sampling distribution of the mean weight of the baby elephants

c) Construct a 95% confidence interval for the mean weight of the baby elephants.