A bank manager wants to learn more about the relationship between the time a customer has to wait to be served and the overall satisfaction with the bank's service. He measures waiting time for a sample of 7 randomly selected customers, and then asked them to answer a survey to find an overall satisfaction score. The results are shown below. Wait time (seconds) : 35 80 15 140 100 86 375 Satisfaction score: 69 38 70 82 84 52 37 Find the sample correlation coefficient between satisfaction score and wait time. Give your answer to 3 decimal places.
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