H
0
:
p
=
0
.1
8
a
nd
H
1
:
p
>
0
.1
8
WEEK 5 HOMEWORK
1.
In hypothesis testing the statistical conclusion is either to
reject or not to reject the null hypothesis based on the sample
data. Which of the following statements is true?
The conclusion will never reject a true null hypothesis.
The conclusion is always subject to error because it is
based on sample data.
The conclusion is always free from error if the correct
procedure is followed.
The conclusion will always reject a false null hypothesis.
2.
If a company wants to prove that the proportion (p) of its
revenues from overseas operations is more than 18%, the null
and alternate hypotheses are .
H
0
:
p
=
0
.1
8
a
nd
H
1
:
p
≤
0
.1
8
H
0
:
p
≤
0
.1
8
a
nd
H
1
:
p
>
0
.1
8
H
0
:
p
>
0
.1
8
a
nd
H
1
:
p
<
0
.1
8
3.
A
te
s
t
o
f
the
hyp
o
the
s
e
s
,
H
0
:
p
=
0
.1
8
a
nd
H
1
:
p
>
0
.1
8
i
s
a
.
one-tailed test
test of two sample means
test of two sample
proportions
two-tailed test
4.
The dean of a business school claims that the average
starting salary of its graduates is more than 85(in $000’s). It is
known that the population standard deviation is 10 (in $000’s).
Sample data on the starting salaries of 64 randomly selected
