This attempt took 86 minutes.
Question 1
pts
Let's use Newton's method with to find an approximate solution to . After 2 iterations, what is the
approximate value of ? Use 3 decimal places.
a. 1.410Correct!
b. 1.417
c. 1.448
d. 1.500
e. 1.514
Question
2
pts
Suppose and have joint p.d.f. for , . Find
. a. 1/4
b.1/2
Correct!
c. 3/4
d.2/3
e.1
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Question 3
pts
YES or NO? Consider again the joint p.d.f. from the previous question for , . Are and
independent random variables?
Correct!
a.Yes
b.No
Question 4
pts
If and are i.i.d. random variables, find
. a. 0
b.10
c. 20
Correct!
d.52
e.208
Question 5
pts
If and
a. 0
b. 1/4Correct!
c. 1/2
d. 1
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2
e. are i.i.d. random variables, find .
Question 6
pts
If
a.
b.
c.
Correct!
d.Both (b) and (c)
e.All of the above.
are i.i.d. , what is the distribution of
?
Question 7
pts
Find the sample variance of the four observations: 4, 4, 5 and
10. a. 2.87
b.5.75
c. 6.19
d.7.33Correct!
e.8.25
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