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Nine-hundred'students were given an exam of which the maximum score is 400. The population mean. is 310, but the population standard deviation is not

Nine-hundred'students were given an exam of which the maximum score is 400. The population \" mean. is 310, but the population standard deviation is not known. The scores are approximately normally distributed. Please construct a 95% condence interval given a sample mean of 300 and a sample standard deviation of 12. 0 (309.21, 310.78) 0 (299.22, 300.78) C) (299.34, 300.66) * Q (399.21, 400.78) * Previous a neischliisav A

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