Homework 1
Problem 1
(
(a) Recall that: A = AB + AB
B = BA + B A
(
AB AB disjoint
BA B A disjoint
) P (A) = P (AB ) + P (AB)
P (B ) = P (BA) + P (B A)
) = 0.
and since P (A) = P (B ) = P (AB ), we have P (AB ) = P (AB
are disjoint, therefore:
Finally, n
From Last Week
Central Limit Theorem: The sampling distribution is
approximately normal if the sample size n is large enough,
even if the population is non-normal.
Statistical Analysis
Class 4. Hypothesis Testing
Yiqing Xing
! = !
! = !/ !
If you draw l