A marketing company uses amount spent on advertising (in 1000's of dollars) to predict the amount of sales (in 1000's of dollars). They collect data resulting in the following summary information. Calculate the pearson correlation coefficient. (round your answer to 2 decimal places).
n=10
Σ x=50
Σ x^2=270
Σ y=430
Σ y^2=20000
Σ xy=2320
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