1. The average salary for a certain profession is $93,000. Assume
that the standard deviation of such salaries is $39,000. Consider a
random sample of 78 people in this profession and let x represent the
mean salary for the sample.
2. The data on age in years and title of 12 of the most powerful women in Country Aare shown in the table to the right:
Rank
Age
Title
1
45
CEO/president
2
53
CEO/president
3
47
CEO/chairman
4
51
Chairman
5
49
CEO/president
6
55
President
7
44
President
8
46
Chairman
9
49
Treasurer
10
41
CEO/chairman
11
54
Chairman
12
37
President
3. When bonding teeth, orthodontists must maintain a dry field. A new
bonding adhesive has been developed to eliminate the necessity of a dry
fieldâ¦Tests on a sample of 10 extracted teeth bonded with the new
adhesive resulted a mean breaking strength (after 24 hours) of x=5.48
MPA and a standard deviation of s =0.37 MPA. Orthodontists want to know
if the true mean breaking strength is less than 6.00 MPA , the mean
breaking strengthof the composite adhesive.
4. A local news wheatherman is researching average temperatures in
Celsius and Fahrenheit for the Cleveland area over the last ten years.
The data being collected can be categorized as.
5. Jason is designing a survey to measure the extent to which college
students who own an Ipod will recommend that others should also buy an
Ipod. He has created the following measure:1. Have you ever recommended
an Ipod to anyone? Answer: Yes or No.
What type of scale is used?
6. A newspaper reported the results of a survey on the planning
habits of men and womenâ¦55% men and 45% women answered âI keep them in
my headâ. A nationally representative sample of 1,000 adults
participated in the survey (500 men, 500 women).
7. Suppose you wish to estimate the population mean correct to within
0.15 with the confidence level of 0.90. You do not know q^2, but you
know that the observations will range in value between 36 and 44.
8. A business study conducted by researchers showed a positive
correlation between employee engagement and customer satisfaction. This
is an example of what type of research?
9. are summary descriptors of variables of interest in the population.
10. Researchers reported on the search shares for the most popular
search engines available on the Web. Search engine A accounted for 50%
of all searches, search engine B for 22%, search engine C for 11%, and
all other search engines for 17%. Suppose that in a random sample of
1035 recent Internet searches 466 used search engine A, 239 used search
engine B, 123 used engine C, and 207 used another engine.
11. The partially completed ANOVA for 3Ã4 factorial experiment with two replications is shown to the right:
Source
df
SS
MS
F
A
–
0.1
–
–
B
–
3.8
–
–
AB
–
8.5
–
–
Error
–
–
–
Total
–
16.8
12. Construct a scattergram, calculate r and r^2:
x
y
-1
-5
0
-2
1
-1
2
2
3
5
13. A researcher investigated the effect of guilt emotion on how a
decision maker focuses on a problem. A total of 180 volunteer
studentsâ¦Is there sufficient evidence (at a=0.05) to claim that the
option choice depends on emotional state?
Emotional State
Choose Stated Option
Do Not Choose Stated Option
Totals
Guilt
46
12
58
Anger
9
54
63
Neutral
6
53
59
Totals
61
119
180
14. A is used to gather preliminary insights before a full research study is conducted.
15. Which term below refers to an analytical process for measuring the semantic content of a communication?
16. The random sample shown below was selected from a normal distribution:
10
7
7
4
5
3
17. A magazine reported on an independent study of postal workers and
violences at postal offices. In a sample of 13,000 postal workers 520
were physically assaulted on the job in the recent year.
18. Which format for presenting statistics is best for enhancing comprehension and providing adequate information?
19. A minitab printout relating the size of the diamond to the asking
price for 308 diamonds is shown below: The regression equation is
Price= -2290+11591carat.
20. A marketing research firm doing business research using 6-10 participants and a trained moderator is conducting aâ¦
21. A measurement question where the participant chooses the words to frame the answer is aâ¦. question.
22. A study of Machiavellian traits in consultants was performedâ¦
23. When a research participant gives an incomplete answer or else provides an incorrect answer this is an example of a â¦
24. Robotics researchers investigated whether robots could be trained
to behave like ants in an ant colony. Robots were trained and randomly
assigned to colonies consisting of 4,8,12, or 16 robotsâ¦error rate of
0.05.
Sample mean
Group size
0.97
4
0.95
8
0.92
12
0.81
16
25. A means of support in a research presentation that enhances ethos is.
26. The data in the table to the right resulted from an experiment that utilized a completely randomized design:
Treatment 1
Treatment 2
Treatment 3
3.4
5.3
1.5
1.7
2.2
0.4
4.4
4.9
2.3
5.4
3.6
2.0
27. The is the process of first stating the basic problem and then
developing additional questions by subsequently dissecting the original
question from the general to more specific questions.
28. A new type of screening for lung cancer CT has been developed.
29. A researcher employed 4 independent variables in a regression
model to predict a measure of the novelty level of vacations chosen by
406 golfers.
30. Oil field pipes are internally coated in order to prevent corrosion.
1.91
1.82
2.03
2.49
2.36
1.92
2.96
1.47
1.07
2.43
1.28
2.73
2.09
1.52
2.43
1.84
1.31
2.23
2.21
1.78
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