Duke University
Math 41L.09: Intro to Calc II
September 27, 2011
Practice Exam 2
•
Do not
open this test booklet until you are directed to do so.
Do
sign and print your
name at the bottom of this page right now.
•
You will have 75 minutes to complete the exam. If you finish early go back and check
your work.
•
This exam is closed book and closed notes. Calculators, laptops, cell phones, etc., are
not allowed.
However, you are allowed to use one handwritten crib sheet no bigger
than 8
1
2
00
×
11
00
.
•
Throughout the test, show your work so that your reasoning is clear. Numerical answers
should be exact and need not be simplified. Circle your answers for clarity. The last
page is left blank for scratch work.
•
Suggestion: don’t spend too much time on any one problem. Do whichever problems
are easiest for you first.
1
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1. You wish to determine if substance
A
causes cancer
B
. Patients who are not exposed to
substance
A
only have a 5% chance of getting cancer
B
. You decide to take 100 random
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 Spring '08
 Bray,C
 Math, Calculus, Power Series, Standard Deviation, Mathematical analysis

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