If you have constructed your subsets correctly,your means should be

mean ofNino.Temp 19.76553 ;Nina.Temp18.92117

Set up a 2 Sample T-Test to test ifNinoTemperatures are warmer (greater) than Nina Temperatures. Assume a confidence level of 95 %. Assign the var.equal keyword argument based on your previous response.

Is this a one-sided or two-sided test.

Input the results of the test below.