Multiple choices 23/50
Answer (Choose 1 answer)
( See picture)
A. None of the others
B. 0.5438
C. 0.6438
D. 0.4562
E. 1
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A random sample of size ni = 16 is selected from a normal population with a mean of 75 and a standard deviation of 8. A second random sample of size n₂ 9 is taken from another nor-mal population with a mean of 70 and standard deviation 12. Let X₁ and X₂ be the two sample means. Find P(X₁ - X2 > 5.5).
Let P(Z< 0.11) = 0.5438.
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