A sample of 100 students shows the test scores of 25, 64, …, 35. Calculations show that 25 + 64 + … + 35 = 3,900 and 252 + 642 +… + 352 =166,356.the instructor increases each test score by 10%, and then adds 5 marks to each score after the 10% increase. As the result of these changes, the standard deviation of the new test scores is closest to
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