# Question: Independent random samples of sizes 400 are taken from each

Independent random samples of sizes 400 are taken from each of two populations having equal means and the standard deviations σ1 = 20 and σ2 = 30. Using Chebyshev’s theorem and the result of Exercise 8.2, what can we assert with a probability of at least 0.99 about the value we will get for 1 – 2? (By “ independent” we mean that the samples satisfy the conditions of Exercise 8.2.)

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