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The following is a sample of 20 people who were asked, how many days did they go to the gym last year: 156, 150,

The following is a sample of 20 people who were asked, how many days did they go to the gym last year: 156, 150, 123, 173, 147, 182, 146, 152, 142, 164, 128, 129, 134, 142, 158, 174, 161, 100, 158, 161 Calculate the 1st quartile.

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