Which of the following is not necessarily true for independent events A and B?
a. P(A and B) = P(A)P(B)
b. P(AB)=P(A)
c. P(BA)=P(B)
d. P(A or B) = P(A) + P(B)
Question 2
In a past General Social Survey, 87 of a random sample of n = 990 respondents answered yes to the question Would you approve of an adult male punching a stranger if the stranger had broken into the man's house? A 95 confidence interval for the proportion of all Americans who approve of punching an intruder is
a. 0.852 to 0.888
b. 0.849 to 0.891
c. 0.845 to 0.895
d. 0.842 to 0.898
Adapoids and omomyoids had longer snouts and are the first “true” primates.
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