19) A group of 51 randomly selected stalets have a mean scoe of 293 wh d of 52 on a placement test. What is the 90 confidence inneral for the mean soom students taking the test? A) 28.8 << 302 B) 283 << 30.7 Q 27.8 << 31.2 D) 27.9 << 31.1

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