(* correlation tester *)

a = {2.8287,2.8278,2.8269,2.8266,2.8279,2.8277,2.827,2.829,2.8266,2.8283,2.8284,2.8282,2.8269,2.8274,2.8273,2.8273,2.8286,2.828,2.8287,2.8268,2.8295,2.828,2.8272,2.8274,2.8279,2.828,2.8283,2.8273,2.8274,2.8277,2.8269,2.8284,2.8269,2.8285,2.8285,2.827,2.8276,2.8277,2.8262,2.8271,2.828,2.8267,2.827,2.8287,2.8285,2.8275,2.8277,2.827,2.8269,2.8257,2.8269,2.8277,2.8263,2.8274,2.828,2.8272,2.8274,2.8284,2.8275,2.8279,2.8281,2.8271,2.8273,2.8282,2.8281,2.8267,2.8282,2.8288,2.8289,2.8284,2.8278,2.8276,2.8282,2.8273,2.8276,2.8276,2.827,2.8274,2.8278,2.8269,2.8268,2.827,2.8276,2.8275,2.8268,2.8271,2.8267,2.8279,2.8278,2.8282,2.8283,2.8266,2.8273,2.8273,2.829,2.8273,2.8269,2.8269,2.8282,2.8276,2.8269,2.829,2.8265,2.8274,2.8268,2.8267,2.8271,2.8278,2.8275,2.8271,2.8278,2.8271,2.8276,2.8284,2.8268,2.8268,2.828,2.8275,2.8276,2.8263,2.827,2.8277,2.8272,2.8289,2.8268,2.8264,2.8282,2.8274,2.8294,2.8273,2.8279,2.8277,2.8275,2.8275,2.8266,2.8284,2.8268,2.8277,2.826,2.828,2.8276,2.8267,2.8273,2.8278,2.8265,2.829,2.8288,2.8278,2.8269,2.8291,2.8279,2.8277,2.8277,2.8277,2.8282,2.8276,2.8273,2.8266,2.8271,2.8286,2.8263,2.8258,2.8278,2.8272,2.829,2.8273,2.8273,2.827,2.8286,2.8284,2.8285,2.8269,2.8281,2.8288,2.8274,2.8277,2.8276,2.8286,2.8285,2.8269,2.8263,2.8282,2.8279,2.8267,2.8265,2.8285,2.8276,2.8278,2.8275,2.8274,2.8274,2.8275,2.8276,2.8273,2.828,2.8273,2.8276,2.8265,2.8276,2.8276,2.8273,2.8283,2.8269,2.8279,2.8276,2.8285,2.8277,2.8272,2.8272,2.8274,2.8273,2.8282,2.8279,2.8275,2.8272,2.8276,2.8282,2.8269,2.8274,2.8275,2.8276,2.8279,2.8279,2.8283,2.8279,2.8272,2.8289,2.8277,2.828,2.829,2.8273,2.828,2.8278,2.8277,2.8271,2.8266,2.8266,2.8294,2.8286,2.829,2.8288,2.8277,2.8268,2.8271,2.8282,2.8282,2.8264,2.8275,2.8277,2.8273,2.8278,2.8277,2.827,2.8289,2.8283,2.8276,2.8281,2.8281,2.8273,2.8277,2.829,2.8267,2.8272,2.8288,2.8283,2.8263,2.8296,2.8265,2.8271,2.8281,2.8277,2.8282,2.828,2.8277,2.8276,2.8284,2.8282,2.8275,2.8274,2.827,2.8287,2.8289,2.8271,2.8268,2.8271,2.8273,2.8268,2.8277,2.8276,2.8277,2.8275,2.8273,2.8274,2.8266,2.8268,2.8286,2.8276,2.8267,2.827,2.8267,2.8276,2.828,2.828,2.8271,2.8274,2.8284,2.8279,2.8269,2.8281,2.8271,2.8292,2.8291,2.8269,2.8294,2.8274,2.8273,2.8287,2.8277,2.8266,2.8268,2.8282,2.826,2.8276,2.8268,2.8274,2.8275,2.828,2.8289,2.8276,2.827,2.827,2.8274,2.8273,2.8289,2.8274,2.8282,2.8274,2.8274,2.8278,2.8269,2.8277,2.8279,2.8285,2.8272,2.8287,2.8272,2.8273,2.8283,2.8277,2.8284,2.8279,2.8278,2.8279,2.8277,2.8283,2.8276,2.8291,2.8286,2.8277,2.8294,2.8272,2.8268,2.8277,2.8276,2.8271,2.8269,2.8278,2.8284,2.8267,2.8279,2.827,2.8273,2.8269,2.8276,2.8282,2.8271,2.8278,2.8292,2.8273,2.8275,2.8277,2.8275,2.8268,2.8292,2.8279,2.8283,2.8283,2.8276,2.828,2.8268,2.8271,2.8276,2.8288,2.8288,2.8271,2.8275,2.8271,2.8282,2.8279,2.8278,2.8269,2.8273,2.8275,2.8278,2.8271,2.8284,2.8274,2.8287,2.8275,2.8275,2.828,2.8272,2.8287,2.827,2.8293,2.8276,2.8276,2.8276,2.8277,2.8283,2.8278,2.8279,2.8285,2.8277,2.8262,2.8273,2.8273,2.8283,2.8276,2.8285,2.8287,2.8275,2.8285,2.828,2.8272,2.8271,2.8272,2.8276,2.8273,2.8284,2.8275,2.8273,2.8271,2.827,2.8274,2.83,2.8282,2.8273,2.827,2.8267,2.8287,2.8271,2.8273,2.8276,2.8279,2.827,2.8282,2.8281,2.8273,2.8271,2.8282,2.8274,2.827,2.8264,2.8281,2.8273,2.8277,2.8274,2.8276,2.8289,2.8281,2.8285,2.8277,2.8271,2.828,2.8284,2.8272,2.8281,2.8274,2.8272,2.8282,2.8282,2.8276,2.8274,2.8288,2.8272,2.827,2.827,2.8278,2.8276,2.8282,2.8301,2.8277,2.8285,2.8296,2.8271,2.8287,2.8261,2.8273,2.8278,2.8274,2.8285,2.8283,2.8278,2.8273,2.8267,2.8278,2.8294,2.8271,2.829,2.8272,2.8278,2.8274,2.8273,2.8269,2.8281,2.8269,2.8263,2.8286,2.8268,2.8274,2.8275,2.8299,2.8282,2.8264,2.8278,2.8281,2.8274,2.8265,2.8282,2.828,2.8283,2.8276,2.8283,2.827,2.8299,2.8282,2.8278,2.8275,2.8291,2.8272,2.8283,2.8281,2.8276,2.8272,2.8274,2.8283,2.8265,2.8278,2.8296,2.8276,2.8272,2.8284,2.8275,2.827,2.828,2.827,2.8274,2.8294,2.8281,2.8283,2.8271,2.8278,2.8275,2.8268,2.8281,2.8276,2.827,2.8284,2.83,2.8271,2.8279,2.8271,2.829,2.8276,2.8269,2.8282,2.8284,2.8278,2.8284,2.8267,2.8283,2.8293,2.8277,2.828,2.8276,2.8282,2.8282,2.827,2.8273,2.8273,2.827,2.8268,2.8269,2.8276,2.8286,2.8278,2.8295,2.8288,2.8276,2.8278,2.826,2.8275,2.8275,2.8289,2.8282,2.8281,2.8289,2.8283,2.8276,2.8278,2.8276,2.8272,2.8274,2.8275,2.8284,2.8281,2.8281,2.8274,2.8271,2.8268,2.8282,2.8273,2.8279,2.8278,2.8276,2.8271,2.8266,2.8274,2.8261,2.8275,2.8288,2.8271,2.8276,2.8282,2.828,2.8282,2.8277,2.8284,2.826,2.8282,2.8285,2.8277,2.827,2.8268,2.8281,2.827,2.8269,2.8273,2.8283,2.8275,2.8276,2.828,2.8281,2.8271,2.8279,2.828,2.8285,2.8273,2.828,2.8272,2.8286,2.8261,2.8278,2.8274,2.8274,2.8287,2.8278,2.828,2.8279,2.8272,2.8279,2.8278,2.8276,2.8279,2.827,2.8271,2.8278,2.8285,2.8276,2.8282,2.828,2.8292,2.8279,2.8285,2.8271,2.8268,2.8265,2.8273,2.8256,2.8285,2.8276,2.8277,2.8276,2.8275,2.8267,2.8281,2.8272,2.8281,2.8276,2.829,2.8285,2.8279,2.8271,2.8281,2.827,2.8284,2.8289,2.8285,2.8276,2.8285,2.8267,2.8266,2.8284,2.8278,2.8279,2.8289,2.8273,2.8274,2.8275,2.8274,2.8286,2.8278,2.8271,2.8281,2.8263,2.8274,2.8288,2.828,2.8279,2.8276,2.8273,2.8284,2.8279,2.8275,2.8292,2.8275,2.8289,2.8277,2.8266,2.8271,2.8282,2.8282,2.8274,2.8272,2.8281,2.8285,2.8274,2.8284,2.8277,2.8285,2.8274,2.8277,2.8274,2.8271,2.8267,2.828,2.8273,2.8285,2.8272,2.8289,2.829,2.8292,2.8286,2.8278,2.8274,2.8268,2.8286,2.827,2.8278,2.8293,2.828,2.8276,2.8269,2.8267,2.8282,2.8271,2.8277,2.828,2.828,2.8274,2.8272,2.8277,2.8292,2.828,2.8279,2.8274,2.8282,2.8279,2.8286,2.8287,2.8268,2.8278,2.8282,2.8276,2.8277,2.8278,2.8281,2.829,2.8271,2.828,2.8281,2.828,2.828,2.8281,2.8285,2.8272,2.8275,2.8279,2.8274,2.8302,2.8277,2.8277,2.8279,2.8284,2.827,2.8276,2.8275,2.8282,2.8281,2.8271,2.8275,2.8267,2.8292,2.8282,2.8285,2.8296,2.8274,2.8267,2.8272,2.8277,2.8277,2.8269,2.8271,2.827,2.8283,2.829,2.8286,2.8285,2.828,2.827,2.8274,2.8269,2.8281,2.829,2.8281,2.8278,2.8268,2.8275,2.8276,2.8268,2.8283,2.8276,2.8284,2.8282,2.827,2.8274,2.8281,2.8278,2.8289,2.8279,2.8274,2.8271,2.8277,2.8281,2.8283,2.827,2.8279,2.8282,2.828,2.8283,2.8283,2.8279,2.8268,2.828,2.8261,2.8282,2.8281,2.8276,2.8277,2.8284,2.8281,2.827,2.8275,2.8279,2.8274,2.8287,2.829,2.8278,2.8282,2.8278,2.8284,2.8297,2.8279,2.8281,2.8278,2.8276,2.8277,2.8282,2.8275,2.8275,2.8275,2.8261,2.8263,2.8268,2.8271,2.8282,2.828,2.8281,2.8278,2.8274,2.8275,2.829,2.8281,2.8274,2.8266,2.8273,2.828,2.8282,2.828,2.827,2.8275,2.8281,2.8275,2.8271,2.8275,2.8287,2.8273,2.8288,2.8264,2.8281,2.828,2.8278,2.8282,2.8292,2.8275,2.8277,2.8272,2.8268,2.8286,2.8278,2.8297,2.8276,2.8272,2.8275,2.8266,2.8276,2.8287,2.8276,2.8276,2.828,2.8269,2.8279,2.8273,2.8272,2.8286,2.8271,2.8289,2.8291,2.8273,2.8283,2.8272,2.8282,2.8278,2.8281,2.8274,2.8291,2.8273,2.8277,2.8278,2.8272,2.8279,2.8268,2.8273,2.8275,2.8268,2.8283,2.8273,2.8263,2.8273,2.8285,2.8278,2.8276,2.8285,2.8265,2.8282,2.8281,2.8278,2.8287,2.8271,2.8275,2.827,2.8279,2.8279,2.8282,2.8281,2.8283,2.828,2.8279,2.8265};
b = 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Correlation[a,b]