I have a sample of 10 squirrels and this sample gives me a s

I have a sample of 10 squirrels and this sample gives me a standard error of 100 g for the mean body weight of squirrels in the population. How many replicates do I need to reduce the standard error to 10 g?

Question 2 options:

About 1000

About 50

About 20

About 500

About 100

Solution

standard error = s/vn=s/sqrt(10) =100

So standard error = 10 = s/vn

So n=100

Answer: About 100