This preview shows pages 1–4. Sign up to view the full content.
RES/342
ANSWERS
Applications 4 – Final Examination (25 points)
Name:
Read this carefully
:
Type your name on the line above.
This is an individual examination.
You must answer the applications on this form. Nonuse of the form will result in
a deduction of ½ of the points for each exercise, not including any deductions
that may be made based on your results.
You must
s
how all formulas (by number or the exact formula) and
calculations
.
Note there is a box in each test statistic part of the application. After you show
your calculations,
type only the test statistics value
in the box provided
.
If you use Excel or any other software to calculate the test statistic, you must
embed the spreadsheet/worksheet into the applications and not as an
attachment.
Complete the following applications:
Part 1: 5 points
Part 2: 5 points
Part 3: 5 points
Part 4: 5 points
Part 5: 5 points
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document 1
.
Hugger Polls contends that an agent conducts a mean of 53 indepth home surveys
every week. A streamlined survey form has been introduced, and Hugger wants to
evaluate its effectiveness. The number of indepth surveys conducted during a week by
a random sample of agents are:
53
57
50
55
58
54
60
52
59
62
60
60
51
59
56
At the .05 level of significance, can we conclude that the mean number of interviews
conducted by the agents is more than 53 per week? Use a standard deviation of
3.7378. If you use Excel, embed the spreadsheet/worksheet into this exercise.
a.
Set up the null hypothesis and alternative hypothesis.
H
0
: µ
<
53
H
1
: µ > 53
b.
State the decision rule.
Reject H
0
if
t
> 1.761 (
df
= 14)
c.
Show calculations for the test statistic.
X
= 846/15 = 56.4
/
56.4 53
3.7378/ 15
3.4
0.96509581
3.522
X
t
s
n
t
t
t
μ

=

=
=
=
Xbar X
3.4
S/N
0.965096
t value
3.522966
HoMean
53
SaMean
56.4
n
15
StdDev
3.7378
Alpha
0.05
Calculated Value
2
df
14
t
3.522966
Test for LeftTail
This preview has intentionally blurred sections. Sign up to view the full version.
View Full Document
This is the end of the preview. Sign up
to
access the rest of the document.
This note was uploaded on 10/10/2010 for the course STATS Stats301 taught by Professor Regis during the Spring '10 term at DeVry Irvine.
 Spring '10
 Regis
 Statistics

Click to edit the document details