Kent Said:

Case Study #1 (Multiple-Choice)?

We Answered:

D, D, D

(These are correct, for sure.)

Lester Said:

HELP PLEASE!! im really farr behind and i really need to get these done!!!?

We Answered:

1. A specific statement that predicts the answer to a research question is a
A) correlation.
B) hypothesis.*
C) case study.
D) placebo.

2. A factor that can vary among people taking part in an experimental study is known as a
A) sample.
B) survey.
C) variable.*
D) theory.

3. A controlled experiment is the only type of research that can show
A) motivation.
B) consent.
C) change.
D) cause and effect.*

4. That is a drawback of a naturalistic study?
A) The researcher lacks control over the research setting.
B) The research subjects must be studied in a lab.* (primarily this but C & D in some circumstances)
C) The researcher always studies just one subject.
D) The research results do not apply to the real world.

5. A survey is a study in which
A) an experimental group is given a placebo.
B) a researcher asks one person many questions.
C) people in a sample are all asked the same questions.*
D) some subjects are placed in an experimental group.

6. Two variables are correlated whenever
A) one changes while the other does not change.
B) one increases while the other does not change.
C) one decreases while the other does not change.
D) both change together in a consistent way.*

7. One way to choose a representative sample in a survey is to
A) obtain informed consent from subjects.
B) select a very small sample from a population.
C) place all the subjects in the control group.*
D) select people at random from a population.

8. What can you conclude if data from a study agree with the result predicted by the hypothesis?
A) The data must contain systematic errors.
B) The data show that the hypothesis could be true.*
C) The data are unrelated to the hypothesis.
D) The data prove that the hypothesis is false.

9. Ethical guidelines require researchers to weigh the potential benefits of research against possible
A) biases in the research design.
B) independent variables in the study.
C) damage to laboratory equipment.
D) risks to study subjects.*

10. The final step of a scientific study is to choose a research design.
A) True
B) False*

11. Subjects in experimental and control groups should be as different as possible.
A) True
B) False* (depends entirely upon many factors, as a rule it is not applicable in all cases - false. To be true it would have to be applicable in 100% of scenarios)

12.
Data from a survey can prove that changes in one variable cause changes in another variable.
A) True
B) False* (depends entirely upon many factors, as a rule it is not applicable in all cases - false. To be true it would have to be applicable in 100% of scenarios)



13. Researchers can generalize from a sample to a population if the sample is representative of the population.
A) True* ('generalise' gives the latitude for 'true')
B) False

14. A naturalistic study reveals a more in-depth understanding of a single individual than does any other research design.
A) True
B) False* (depends entirely upon many factors, as a rule it is not applicable in all cases - false. To be true it would have to be applicable in 100% of scenarios)



15. The first goal of data analysis is to communicate research results.
A) True*
B) False

Sergio Said:

Help! Microbiology Case Study! Know any of these?

We Answered:

d. Gonorrhea infection

d. all of the above

d. Start patient on a course of antibiotics; perform culture and sensitivity tests on vaginal sample, report STD to state health department, obtain a contact list for follow up

Terrance Said:

Statistics regression analysis?

We Answered:

a. The independent variable is x (hours) and the dependent variable is y (scores)

b. a is usually the slope. In this case, that would be 5. That means that for every hour of study, the expected score increases by 5 points.

c. b is usually the y-intercept. In this problem, a score of 56 is what you would expect someone to score who studied for 0 hours.

(Note: some models interchange a and b. Check to see whether your class does yhat = a + bx or yhat = b + ax)

d. The standard error of the estimate is 6.3. This tells us how spread out the data is.

e. The coefficient of determination is r^2 = .847^2 = .717409. This number tells us how much of the variability in one variable is affected by the other variable.

f. yhat(7) = 56 + 5(7) = 56 + 35 = 91

I'll let you do the hypothesis testing.

Bertha Said:

ny expert in Research nd Methodology...help me...on a project?

We Answered:

Mail me through my profile. Let us see what can be done.
Is it part of an academic course? Which university? What course (MSC, MPhil, PhD)? Science or engineering? Time frame? Budget?

Jorge Said:

Corrosion and material analysis :Student final project?

We Answered:

Aluminum alloys are prone to stress-corrosion in sea water. Stainless steel or Austenitic Ductile iron will be a better choice. A study of stress-corrosion behavior of different metals and alloys in sea water may help.