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I want ONLY 8.3 answered (I already did 8.2)

8.2. Use Theorem 4.14 on page 135 and its corollary to show that if X11, X12,... ,X1n,X21, X22,... ,X2n2 are independent random variables, with the first ni constitut- ing a random sample from an infinite population with the mean μ and the variance σ. and the other n2 constitut- ing a random sample from an infinite population with the mean μ2 and the variance σ , then n1 ni2 8.3. With reference to Exercise 8.2, show that if the two samples come from normal populations, then X1 -X2 is a random variable having a normal distribution with the mean μ1-H2 and the variance + n1 n2

I want ONLY 8.3 answered (I already did 8.2)

math   Statistics-And-Probability   
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APRIL SMTWTFS March 2018 2018 , 09 10th week . 068-297 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 I 24 | 25| 26 | 27 | 28MARCH 2018 March 2018 4 5 6789 0 11 12 13 14 15 16 1 18 19 20 21 22 23 24 I0th Week 069-296 Saturday 28 29 30 3 ut +26 2

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