b. Suppose of = 2, o% = 2.5, and m = n. Find the sample size n so that X - Ý will be within one unit of µ1 – µ2 with probability 0.95.

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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EXERCISE 5
Suppose that X1,·, Xm and Y1, ., Yn are two samples, with X; -
between the sample means, X – Ý, is then a linear combination of m +n normal random variables. All the random
variables are independent. Answer the following questions:
Ν(μ1, σι) and Y
N(u2, 02). The difference
a. Use moment generating functions to show that X
variance of this distribution.
Y follows a normal distribution. Find the mean and
-
b. Suppose o = 2, o% = 2.5, and m = n. Find the sample size n so that X - Ý will be within one unit of µi
with probability 0.95.
Transcribed Image Text:EXERCISE 5 Suppose that X1,·, Xm and Y1, ., Yn are two samples, with X; - between the sample means, X – Ý, is then a linear combination of m +n normal random variables. All the random variables are independent. Answer the following questions: Ν(μ1, σι) and Y N(u2, 02). The difference a. Use moment generating functions to show that X variance of this distribution. Y follows a normal distribution. Find the mean and - b. Suppose o = 2, o% = 2.5, and m = n. Find the sample size n so that X - Ý will be within one unit of µi with probability 0.95.
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