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2. (10 pts) Suppose X1, . .., X25 is a random sample of size 25 from a normal distribution with mean / and variance o?

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2. (10 pts) Suppose X1, . .., X25 is a random sample of size 25 from a normal distribution with mean / and variance o? = 16, i.e. X1, . .., X25 ~ N(u, 02 = 42 = 16). A researcher quoted a CI for / to be (16.872, 20.328). What percent CI is this? Show your work using clear notation

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