Electricity usage in homes was studied over a period.

For Year 1:

Mean = 1130

Std dev. = 196

n = 16

For Year 2:

Mean = 1350

Std dev. = 302

n = 21

Calculate a 95% confidence interval for the average usage year 2?

I got the answer

x-bar = 1350 +/- ME

where ME = t(n-1), (alpha/2) x s / sq root of n

Am I on the right track here?