STA 2023
Sample Exam II
Name:
INSTRUCTIONS
1. Fill in all the spaces above with the required information.
2. Make sure your exam includes 7 problems, a formula sheet, a ztable and a binomial table.
The student is responsible for making sure the exam is nondefective.
3. This exam is worth a total of 100 points. The point value of each question is indicated in
parentheses.
4. For questions that are true/false, circle the appropriate response. For questions that are to
be worked out, show your work in the space provided
.
Full credit can only be given when
you show your work.
5.
If a table attached to the exam can be used to find an answer to any question,
you must use the table correctly to receive full credit.
6. If a problem says SET UP
, you don’t need to implement the arithmetic necessary to reach the
final numerical answer. You should work the problem completely up to the point of doing the
arithmetic. Put all numbers into the appropriate formula(s), leaving no symbols or letters.
7. Do not spend too much time on any part of the exam. Skip questions that cause you trouble
and return to them later.
8. When turning in the exam, show your
picture i.d.
FORMULAS
μ
=
E
(
x
) =
xp
(
x
)
σ
2
=
E
(
X

μ
)
2
=
(
x

μ
)
2
p
(
x
) =
E
(
x
2
)

μ
2
=
x
2
p
(
x
)

μ
2
For a binomial random variable:
μ
=
np
σ
2
=
npq
p
(
x
) =
n
x
p
x
q
n

x
where
n
x
=
n
!
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 Fall '08
 Ripol
 Statistics, Binomial, Normal Distribution, Standard Deviation, Standard Error, Probability theory, pts

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