Question: Divide the data into two groups: one group is annual rainfall for the most recent 20 years and the other is all the earlier years.Compute

Divide the data into two groups: one group is annual rainfall for the most recent 20 years and the other is all the earlier years.Compute the sample average for each group, separately.

Also, test for climate change in terms of the annual rainfall for NYC.Let the older data give you "mu", let the newer data give you xbar and s.Use alpha level 5%.Include a graph.

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