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Please help me solve step by step thanks 13. A sample of n = 20 scores, has u = 12 and s = 4. What

Please help me solve step by step thanks

13. A sample of n = 20 scores, has u = 12 and s = 4. What is 3= 3 the sample variance (s?)? n= 20 a. 3 U = 12 b. 16 S = 4 c. 2 d. None of the above

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