Mathematics, 07.07.2019 23:10 tryintopassenioryear

The mean weight of the students in a school is 70 kilograms. a random sample of 25 students was taken and the mean weight was found to be 55 kilograms with a standard deviation of 20 kilograms. what is the test statistics? express your answer into 2 decimal places (example: 25.00)

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