QUESTION 1

STATE THE RESEARCH QUESTION FOR THIS STUDY?

2 POINTS

QUESTION 2

WHO OR WHAT ARE THE OBSERVATIONAL UNITS IN THIS SCENARIO?

2 POINTS

QUESTION 3

IS THIS AN EXPERIMENT OR AN OBSERVATIONAL STUDY? EXPLAIN YOUR REASONING.

3 POINTS

QUESTION 4

STATE THE EXPLANATORY VARIABLE BEING MEASURED ON EACH OBSERVATIONAL

UNIT.

2 POINTS

QUESTION 5

STATE THE RESPONSE VARIABLE BEING MEASURED ON EACH OBSERVATIONAL UNIT.

2 POINTS

QUESTION 6

USING THE CORR/REGRESSION APPLET AND THE HANDSPAN DATA, CREATE A

SCATTERPLOT AND DESCRIBE THE ASSOCIATION BASED ON THE SCATTERPLOT. BE

SURE TO STATE THE DIRECTION, FORM, STRENGTH, AND STATE ANY OBSERVATIONS

THAT APPEAR TO BE UNUSUAL (OR STATE THAT THERE ARE NONE).

4 POINTS

QUESTION 7

STATE THE VALUE OF R FOR THIS SAMPLE. ALSO, DOES THE VALUE OF R MATCH THE

DESCRIPTION OF THE SCATTERPLOT FROM THE PREVIOUS QUESTION. EXPLAIN WHY

OR WHY NOT?

4 POINTS

QUESTION 8

STATE THE NULL AND ALTERNATIVE HYPOTHESIS TO BE TESTED IN THIS STUDY

USING THE CORRELATION. USE EITHER WORDS OR SYMBOLS.

4 POINTS

QUESTION 9

USING THE CORR/REGRESSION APPLET TO TEST YOUR HYPOTHESES FROM THE

PREVIOUS QUESTION USING SIMULATION BASED METHODS. REPORT THE P-VALUE

FROM YOUR SIMULATION AND STATE HOW MUCH EVIDENCE THERE IS AGAINST THE

NULL HYPOTHESIS

4 POINTS

QUESTION 10

USING THE CORR/REGRESSION APPLET, STATE THE EQUATION OF THE LINEAR

REGRESSION LINE.

1 POINTS

QUESTION 11

INTERPRET THE SLOPE OF THE REGRESSION LINE IN THE CONTEXT OF THE

PROBLEM.

4 POINTS

QUESTION 12

EITHER INTERPRET THE Y-INTERCEPT IN THE CONTEXT OF THE PROBLEM OR

EXPLAIN WHY IT HAS NO PRACTICAL MEANING.

3 POINTS

QUESTION 13

BASED ON THE LEAST-SQUARES REGRESSION EQUATION, PREDICT TO TWO DECIMAL

PLACES THE NUMBER OF TOOTSIE ROLLS A PERSON WITH A HAND SPAN OF 20 CM

CAN GRAB, ON AVERAGE.

4 POINTS

QUESTION 14

STATE THE VALUE OF R2 AND INTERPRET THAT VALUE IN THE CONTEXT OF THE

PROBLEM

4 POINTS

QUESTION 15

USING THE CORR/REGRESSION APPLET, CONDUCT A THEORY BASED HYPOTHESIS

TEST OF THE SLOPE BASED ON YOUR RESEARCH QUESTION. BE SURE TO STATE THE

NULL AND ALTERNATIVE HYPOTHESES, THE T-STATISTIC, THE P-VALUE, AND THE

STRENGTH OF EVIDENCE AGAINST THE NULL HYPOTHESIS.

8 POINTS

QUESTION 16

ARE YOU ABLE TO CONCLUDE THAT THE ASSOCIATION BETWEEN HAND SPAN AND

THE NUMBER OF TOOTSIE ROLLS GRABBED IS CAUSAL (DUE TO CAUSE AND EFFECT).

WHY OR WHY NOT?

3 POINTS

QUESTION 17

ARE YOU ABLE TO GENERALIZE THESE RESULTS TO A LARGER POPULATION? WHY OR

WHY NOT?

3 POINTS

QUESTION 18

SUMMARIZE THE RESULTS OF THE STUDY. WRITE AT LEAST A SENTENCE OR TWO

ABOUT WHAT YOU WOULD CONCLUDE BASED ON THE WORK YOU’VE DONE IN THE

PREVIOUS QUESTIONS.

5 POINTS

lo

589

기

K

300+

Frequency

200

attorneys

+

d. High school graduation rate and 1

over 25 with a four-year college deg

e. Year of statehood and number of ye

f. Year of statehood and longitude (ea

g. Longitude and latitude (north/sout]

h. Latitude and average annual tempei

100+

0

-1.0

-0.5

0.0

0.5

1.0

r

©

INVESTIGATION: ASSOCIATION BETWEEN

HAND SPAN AND CANDY?

Is hand span a good predictor of how much candy you can grab? Using 45 college students as

subjects, researchers set out to explore whether a linear relationship exists between hand span

(cm) and the number of Tootsie Rolls each subject could grab.

STEP 1: Ask a research question.

590

1. State the research question.

+

–

كما

STEP 2: Design a study and collect data.

2. What are the observational/experimental units?

3. Is this a randomized experiment or an observational study? Explain how you know.

4. State the two variables measured on each unit.

5. Is there an explanatory/response relationship for these variables? Classify the variables in

this study as categorical or quantitative.

6. State the null and alternative hypotheses to be investigated with this study.

STEP 3: Explore the data.

7. Use the data set HandSpan to calculate means, standard deviations, and the correlation

coefficient.

8. Create a scatterplot of the data with hand span on the x-axis and number of Tootsie Rolls

on the y-axis.

9. Does there appear to be an association between hand span and number of Tootsie Rolls?

Describe the direction, form, and strength of the association: Is it positive, negative, weak,

strong, linear?

10. Are there any unusual observations?

11. Find the least squares regression equation that predicts number of Tootsie Rolls based on

hand span.

12. Interpret the slope of the least squares regression equation in terms of hand span and

predicted number of Tootsie Rolls grabbed.

STEP 4: Draw inferences.

13. Use the appropriate applet to construct a simulated null distribution using the slope of the

least squares regression line as the statistic. Mark the observed least squares slope on this

graph.

a. Paste a screenshot or draw your null distribution below with the observed slope marked

and the approximate p-value shaded in.

b. Is the observed statistic out in the tail of this null distribution or is it a fairly typical

result?

c. What is the p-value from your simulation? Based on this simulation analysis, would

you conclude that the data provide strong evidence against the null hypothesis and con-

clude that there is a significant association between hand span and number of Tootsie

Rolls grabbed? Explain your reasoning.

14. Are the validity conditions met to complete a theory-based t-test on these data? Explain.

Whether the conditions are met or not, use a theory-based t-test to find a p-value. How

does this p-value compare to the p-value your found using the randomization method?

15. Find a confidence interval for the slope that would describe the association between all

hand spans and number of Tootsie Rolls grabbed. Is zero in this interval? Does this make

sense based on the p-value from your test of significance?

591

+

كما

STEP 5: Formulate conclusions.

16. Are you able to conclude that the association between hand span and number of Tootsie

Rolls grabbed is causal? Explain.

17. What generalizations are you willing to make? Explain.

STEP 6: Look back and ahead.

18. Summarize the findings from the study. What worked well in this study design? What

would you change? What are some follow-up research questions you would like to explore

based on the findings from this study?

(3)

Research Article

www.wiley.com/college/tintle

Music Problems Read “Early Adolescent Music Preferences and Minor Deliquency by

ter Bogt, Keijsers, Meeus, et al. (2013), 131(2), 1-10, in the Journal of Pediatrics.

Purchase answer to see full

attachment

STATE THE RESEARCH QUESTION FOR THIS STUDY?

2 POINTS

QUESTION 2

WHO OR WHAT ARE THE OBSERVATIONAL UNITS IN THIS SCENARIO?

2 POINTS

QUESTION 3

IS THIS AN EXPERIMENT OR AN OBSERVATIONAL STUDY? EXPLAIN YOUR REASONING.

3 POINTS

QUESTION 4

STATE THE EXPLANATORY VARIABLE BEING MEASURED ON EACH OBSERVATIONAL

UNIT.

2 POINTS

QUESTION 5

STATE THE RESPONSE VARIABLE BEING MEASURED ON EACH OBSERVATIONAL UNIT.

2 POINTS

QUESTION 6

USING THE CORR/REGRESSION APPLET AND THE HANDSPAN DATA, CREATE A

SCATTERPLOT AND DESCRIBE THE ASSOCIATION BASED ON THE SCATTERPLOT. BE

SURE TO STATE THE DIRECTION, FORM, STRENGTH, AND STATE ANY OBSERVATIONS

THAT APPEAR TO BE UNUSUAL (OR STATE THAT THERE ARE NONE).

4 POINTS

QUESTION 7

STATE THE VALUE OF R FOR THIS SAMPLE. ALSO, DOES THE VALUE OF R MATCH THE

DESCRIPTION OF THE SCATTERPLOT FROM THE PREVIOUS QUESTION. EXPLAIN WHY

OR WHY NOT?

4 POINTS

QUESTION 8

STATE THE NULL AND ALTERNATIVE HYPOTHESIS TO BE TESTED IN THIS STUDY

USING THE CORRELATION. USE EITHER WORDS OR SYMBOLS.

4 POINTS

QUESTION 9

USING THE CORR/REGRESSION APPLET TO TEST YOUR HYPOTHESES FROM THE

PREVIOUS QUESTION USING SIMULATION BASED METHODS. REPORT THE P-VALUE

FROM YOUR SIMULATION AND STATE HOW MUCH EVIDENCE THERE IS AGAINST THE

NULL HYPOTHESIS

4 POINTS

QUESTION 10

USING THE CORR/REGRESSION APPLET, STATE THE EQUATION OF THE LINEAR

REGRESSION LINE.

1 POINTS

QUESTION 11

INTERPRET THE SLOPE OF THE REGRESSION LINE IN THE CONTEXT OF THE

PROBLEM.

4 POINTS

QUESTION 12

EITHER INTERPRET THE Y-INTERCEPT IN THE CONTEXT OF THE PROBLEM OR

EXPLAIN WHY IT HAS NO PRACTICAL MEANING.

3 POINTS

QUESTION 13

BASED ON THE LEAST-SQUARES REGRESSION EQUATION, PREDICT TO TWO DECIMAL

PLACES THE NUMBER OF TOOTSIE ROLLS A PERSON WITH A HAND SPAN OF 20 CM

CAN GRAB, ON AVERAGE.

4 POINTS

QUESTION 14

STATE THE VALUE OF R2 AND INTERPRET THAT VALUE IN THE CONTEXT OF THE

PROBLEM

4 POINTS

QUESTION 15

USING THE CORR/REGRESSION APPLET, CONDUCT A THEORY BASED HYPOTHESIS

TEST OF THE SLOPE BASED ON YOUR RESEARCH QUESTION. BE SURE TO STATE THE

NULL AND ALTERNATIVE HYPOTHESES, THE T-STATISTIC, THE P-VALUE, AND THE

STRENGTH OF EVIDENCE AGAINST THE NULL HYPOTHESIS.

8 POINTS

QUESTION 16

ARE YOU ABLE TO CONCLUDE THAT THE ASSOCIATION BETWEEN HAND SPAN AND

THE NUMBER OF TOOTSIE ROLLS GRABBED IS CAUSAL (DUE TO CAUSE AND EFFECT).

WHY OR WHY NOT?

3 POINTS

QUESTION 17

ARE YOU ABLE TO GENERALIZE THESE RESULTS TO A LARGER POPULATION? WHY OR

WHY NOT?

3 POINTS

QUESTION 18

SUMMARIZE THE RESULTS OF THE STUDY. WRITE AT LEAST A SENTENCE OR TWO

ABOUT WHAT YOU WOULD CONCLUDE BASED ON THE WORK YOU’VE DONE IN THE

PREVIOUS QUESTIONS.

5 POINTS

lo

589

기

K

300+

Frequency

200

attorneys

+

d. High school graduation rate and 1

over 25 with a four-year college deg

e. Year of statehood and number of ye

f. Year of statehood and longitude (ea

g. Longitude and latitude (north/sout]

h. Latitude and average annual tempei

100+

0

-1.0

-0.5

0.0

0.5

1.0

r

©

INVESTIGATION: ASSOCIATION BETWEEN

HAND SPAN AND CANDY?

Is hand span a good predictor of how much candy you can grab? Using 45 college students as

subjects, researchers set out to explore whether a linear relationship exists between hand span

(cm) and the number of Tootsie Rolls each subject could grab.

STEP 1: Ask a research question.

590

1. State the research question.

+

–

كما

STEP 2: Design a study and collect data.

2. What are the observational/experimental units?

3. Is this a randomized experiment or an observational study? Explain how you know.

4. State the two variables measured on each unit.

5. Is there an explanatory/response relationship for these variables? Classify the variables in

this study as categorical or quantitative.

6. State the null and alternative hypotheses to be investigated with this study.

STEP 3: Explore the data.

7. Use the data set HandSpan to calculate means, standard deviations, and the correlation

coefficient.

8. Create a scatterplot of the data with hand span on the x-axis and number of Tootsie Rolls

on the y-axis.

9. Does there appear to be an association between hand span and number of Tootsie Rolls?

Describe the direction, form, and strength of the association: Is it positive, negative, weak,

strong, linear?

10. Are there any unusual observations?

11. Find the least squares regression equation that predicts number of Tootsie Rolls based on

hand span.

12. Interpret the slope of the least squares regression equation in terms of hand span and

predicted number of Tootsie Rolls grabbed.

STEP 4: Draw inferences.

13. Use the appropriate applet to construct a simulated null distribution using the slope of the

least squares regression line as the statistic. Mark the observed least squares slope on this

graph.

a. Paste a screenshot or draw your null distribution below with the observed slope marked

and the approximate p-value shaded in.

b. Is the observed statistic out in the tail of this null distribution or is it a fairly typical

result?

c. What is the p-value from your simulation? Based on this simulation analysis, would

you conclude that the data provide strong evidence against the null hypothesis and con-

clude that there is a significant association between hand span and number of Tootsie

Rolls grabbed? Explain your reasoning.

14. Are the validity conditions met to complete a theory-based t-test on these data? Explain.

Whether the conditions are met or not, use a theory-based t-test to find a p-value. How

does this p-value compare to the p-value your found using the randomization method?

15. Find a confidence interval for the slope that would describe the association between all

hand spans and number of Tootsie Rolls grabbed. Is zero in this interval? Does this make

sense based on the p-value from your test of significance?

591

+

كما

STEP 5: Formulate conclusions.

16. Are you able to conclude that the association between hand span and number of Tootsie

Rolls grabbed is causal? Explain.

17. What generalizations are you willing to make? Explain.

STEP 6: Look back and ahead.

18. Summarize the findings from the study. What worked well in this study design? What

would you change? What are some follow-up research questions you would like to explore

based on the findings from this study?

(3)

Research Article

www.wiley.com/college/tintle

Music Problems Read “Early Adolescent Music Preferences and Minor Deliquency by

ter Bogt, Keijsers, Meeus, et al. (2013), 131(2), 1-10, in the Journal of Pediatrics.

Purchase answer to see full

attachment

Why Work with Us

Top Quality and Well-Researched Papers

We always make sure that writers follow all your instructions precisely. You can choose your academic level: high school, college/university or professional, and we will assign a writer who has a respective degree.

Professional and Experienced Academic Writers

We have a team of professional writers with experience in academic and business writing. Many are native speakers and able to perform any task for which you need help.

Free Unlimited Revisions

If you think we missed something, send your order for a free revision. You have 10 days to submit the order for review after you have received the final document. You can do this yourself after logging into your personal account or by contacting our support.

Prompt Delivery and 100% Money-Back-Guarantee

All papers are always delivered on time. In case we need more time to master your paper, we may contact you regarding the deadline extension. In case you cannot provide us with more time, a 100% refund is guaranteed.

Original & Confidential

We use several writing tools checks to ensure that all documents you receive are free from plagiarism. Our editors carefully review all quotations in the text. We also promise maximum confidentiality in all of our services.

24/7 Customer Support

Our support agents are available 24 hours a day 7 days a week and committed to providing you with the best customer experience. Get in touch whenever you need any assistance.

Try it now!

How it works?

Follow these simple steps to get your paper done

Place your order

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Receive the final file

Once your paper is ready, we will email it to you.

Our Services

No need to work on your paper at night. Sleep tight, we will cover your back. We offer all kinds of writing services.

Essays

No matter what kind of academic paper you need and how urgent you need it, you are welcome to choose your academic level and the type of your paper at an affordable price. We take care of all your paper needs and give a 24/7 customer care support system.

Admissions

Admission Essays & Business Writing Help

An admission essay is an essay or other written statement by a candidate, often a potential student enrolling in a college, university, or graduate school. You can be rest assurred that through our service we will write the best admission essay for you.

Reviews

Editing Support

Our academic writers and editors make the necessary changes to your paper so that it is polished. We also format your document by correctly quoting the sources and creating reference lists in the formats APA, Harvard, MLA, Chicago / Turabian.

Reviews

Revision Support

If you think your paper could be improved, you can request a review. In this case, your paper will be checked by the writer or assigned to an editor. You can use this option as many times as you see fit. This is free because we want you to be completely satisfied with the service offered.