IE 121 – Spring 2002
Final exam
1. (20 points) In this problem, you need to select the correct answer.
1. If the Pvalue for your test statistic is
P
=
.
15, then:
(a) you would not reject
H
0
for
α
=
.
05.
(b) you would reject
H
0
for
α
=
.
05.
(c) you would reject
H
0
for
α
=
.
10.
(d) your acceptance region has a lower limit of .15.
(e) none of these
2. Suppose you are going to test
H
0
:
m
=
m
0
,
H
1
:
m
6
=
m
0
using
α
=
.
05.
n
and
σ
2
are given. Find all values of
z
=
(¯
x

μ
)
σ
2
/
√
n
for which
H
0
should be rejected.
3. Which statement about the statistical process control is correct?
4. Suppose we are interested in the mean weight of a certain type of a candy bar. We test
15 samples. The resulting sample average is 6.03 oz and the sample standard deviation
is 1.47 oz. Then the 95% confidence interval for the mean weight is:
1
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5. The Central Limit Theorem is considered powerful in statistics because:
a) It works for any sample size provided the population is normal.
b) It works for any population distribution as long as the sample size is large enough.
c) It works for any population distribution provided the population size is known.
d) It works for any sample size provided the population distribution is known.
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 Spring '08
 Perevalov
 Linear Regression, Normal Distribution, Regression Analysis, Variance

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