CAU HUI 1 (SINGLECHOICE)
A random sample of size n, -16 is selected from a normal population with a mean of 84 and a standard deviation of 8. A second random sample of size n₂ =9 is taken from
another normal population with a mean of 80 and standard deviation 12. Let X, and X2 be the two sample means. Find P(X, - X₂ ≤ 4.5).
None of others.
0.6438
0.5438
1
0.4562
CÂU HỎI 2 (SINGLECHOICE)
Given two box plots of two samples.
Which sample has an outlier?
Neither
Both
2
