Calculate Pearson’s r for the data above.I keep getting 1.77 but when i check with a calculator i

am getting a different answer.

Here is my work for the answer that I am getting.

              i.         Calculate the numerator

∑XY – [(∑X∑Y)/N]

4577.69-[(84.6)(983.7)/20]

4577.69-(83221.02/20)

4577.69-4161.05

416.64 is numerator

                         ii.         calculate the demoninator

                        iii.         

sq rt (∑X² – ((∑X)²/N)( ∑y2- (∑y)*2/N))

sq rt(447.53 – 7157.16/20)(49004.2-967665.69/20)

              sq rt(447.53-357.86)(49004.2-48383.28)

sq rt(89.67)(620.92)

sq rt 55,677.8964

235.96 is demoninator

Divide top and bottom

416.64/235.96= 1.77

Pearsons R is 1.77

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