2 X is a normally distributed random variable with mean, u but unknown variance, o Which of these statements is true about the sample mean, X of a random sample of size, n? s' is the sample variance estimate of o. X-u А. 풀~tm-1 X-u 프~N(0,1) Vn В. S S n x-u С. ~tn-1 x-u D. . ~Ν (μ. σ )

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Q20. X is a normally distributed random variable with mean, u but unknown variance, o
Which of these statements is true about the sample mean, x of a random sample of
size, n? s is the sample variance estimate of o?.
X-u
A.
~tn-1
X-u
В.
~N(0,1)
intn-1
~N(H, o²)
D.
Transcribed Image Text:Q20. X is a normally distributed random variable with mean, u but unknown variance, o Which of these statements is true about the sample mean, x of a random sample of size, n? s is the sample variance estimate of o?. X-u A. ~tn-1 X-u В. ~N(0,1) intn-1 ~N(H, o²) D.
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