Posts

Mathematics Homework Help

/in /by

WU Wk 8 Correlation & Bivariate Regression Quantitative Article Review

 

To prepare for this Discussion:

  • Review the Learning Resources and the media programs related to correlation and regression.
  • Search for and select a quantitative article specific to your discipline and related to correlation or regression. Help with this task may be found in the Course guide and assignment help linked in this week’s Learning Resources. Also, you can use as guide the Research Design Alignment Table located in this week’s Learning Resources.

Write a 3- to 5-paragraph critique of the article. In your critique, include responses to the following:

  1. What is the research design used by the authors?
  2. Why did the authors use correlation or bivariate regression?
  3. Do you think it’s the most appropriate choice? Why or why not?
  4. Did the authors display the data?
  5. Do the results stand alone? Why or why not?
  6. Did the authors report effect size? If yes, is this meaningful?

Be sure to support your Main Post and Response Post with reference to the week’s Learning Resources and other scholarly evidence in APA Style.

Learning Resources

Required Readings

Frankfort-Nachmias, C., Leon-Guerrero, A., & Davis, G. (2020). Social statistics for a diverse society (9th ed.). Thousand Oaks, CA: Sage Publications.

  • Chapter 12, “Regression and Correlation” (pp. 401-457)

Wagner, III, W. E. (2020). Using IBM® SPSS® statistics for research methods and social science statistics (7th ed.). Thousand Oaks, CA: Sage Publications.

  • Chapter 8, “Correlation and Regression Analysis”

Walden University Library. (n.d.). Course Guide and Assignment Help for RSCH 8210. Retrieved from http://academicguides.waldenu.edu/rsch8210

For help with this week’s research, see this Course Guide and related weekly assignment resources.

Magnusson, K. (n.d.). Welcome to Kristoffer Magnusson’s blog about R, Statistics, Psychology, Open Science, Data Visualization [blog]. Retrieved from http://rpsychologist.com/index.html

As you review this web blog, select New d3.js visualization: Interpreting Correlations link, once you select the link, follow the instructions to view the interactive for interpreting correlations. This interactive will help you to visualize and understand correlations between two variables.

Note: This is Kristoffer Magnusson’s personal blog and his views may not necessarily reflect the views of Walden University faculty.

Document: Walden University: Research Design Alignment Table

Required Media

Laureate Education (Producer). (2016b). Correlation and bivariate regression [Video file]. Baltimore, MD: Author.

Note: The approximate length of this media piece is 9 minutes.

In this media program, Dr. Matt Jones demonstrates correlation and bivariate regression using the SPSS software.

Accessible player

Optional Resources

Correlation

Klingenberg, B. (2016). Correlation game. Retrieved from https://istats.shinyapps.io/guesscorr/

Use the following app/weblink for an interactive visual display of correlation slopes.

Regression

Klingenberg, B. (2016). Explore linear regression. Retrieved from https://istats.shinyapps.io/ExploreLinReg/

Use the following app/weblink for an interactive visual display of regression slopes.

You are encouraged to click through these and all Skill Builders to gain additional practice with these concepts. Doing so will bolster your knowledge of the concepts you’re learning this week and throughout the course.


Mathematics Homework Help

/in /by

Walden University Correlation and Bivariate Regression Report

 

For this Assignment, you will examine correlation and bivariate regression testing.

To prepare for this Assignment:

  • Review this week’s Learning Resources and media program      related to regression and correlation.
  • Using the SPSS software, open the Afrobarometer dataset      or the High School Longitudinal Study dataset (whichever you choose) found      in the Learning Resources for this week.
  • Based on the dataset you chose, construct a research      question that can be answered with a Pearson correlation and bivariate      regression.
  • Once you perform your correlation and bivariate      regression analysis, review Chapter 11 of the Wagner text to understand      how to copy and paste your output into your Word document.

For this Assignment:

Write a 2- to 3-paragraph analysis of your correlation and bivariate regression results for each research question. If you are using the Afrobarometer Dataset, report the mean of Q1 (Age). If you are using the HS Long Survey Dataset, report the mean of X1SES. Do not forget to evaluate if the correlation and bivariate regression assumptions are met and report the effect size. In your analysis, display the data for the output. Based on your results, provide an explanation of what the implications of social change might be.

Use proper APA format, citations, and referencing for your analysis, research question, and display of output.

Learning Resources

Required Readings

Frankfort-Nachmias, C., Leon-Guerrero, A., & Davis, G. (2020). Social statistics for a diverse society (9th ed.). Thousand Oaks, CA: Sage Publications.

  • Chapter 12, “Regression and Correlation” (pp. 401-457)

Wagner, III, W. E. (2020). Using IBM® SPSS® statistics for research methods and social science statistics (7th ed.). Thousand Oaks, CA: Sage Publications.

  • Chapter 8, “Correlation and Regression Analysis”

Walden University Library. (n.d.). Course Guide and Assignment Help for RSCH 8210. Retrieved from http://academicguides.waldenu.edu/rsch8210

For help with this week’s research, see this Course Guide and related weekly assignment resources.

Magnusson, K. (n.d.). Welcome to Kristoffer Magnusson’s blog about R, Statistics, Psychology, Open Science, Data Visualization [blog]. Retrieved from http://rpsychologist.com/index.html

As you review this web blog, select New d3.js visualization: Interpreting Correlations link, once you select the link, follow the instructions to view the interactive for interpreting correlations. This interactive will help you to visualize and understand correlations between two variables.

Note: This is Kristoffer Magnusson’s personal blog and his views may not necessarily reflect the views of Walden University faculty.

Document: Walden University: Research Design Alignment Table

Required Media

Laureate Education (Producer). (2016b). Correlation and bivariate regression [Video file]. Baltimore, MD: Author. 

Note: The approximate length of this media piece is 9 minutes.

In this media program, Dr. Matt Jones demonstrates correlation and bivariate regression using the SPSS software.

Accessible player  –Downloads– Download Video w/CC Download Audio Download Transcript 

Optional Resources

Correlation

Klingenberg, B. (2016). Correlation game. Retrieved from https://istats.shinyapps.io/guesscorr/

Use the following app/weblink for an interactive visual display of correlation slopes.

Regression

Klingenberg, B. (2016). Explore linear regression. Retrieved from https://istats.shinyapps.io/ExploreLinReg/

Use the following app/weblink for an interactive visual display of regression slopes..

Mathematics Homework Help

/in /by

Calculus word problem with Computer Science

 

State and solve a Calculus-based word problem that is relevant to Computer Science. Please make the world problem portion around one paragraph long. The problem does not need to be super long, but the solution and word problem should fit together on one page. The whole thing should be close to a full page. Please let me know if you have any questions. I will be available to help you.

Please pick a category the technique falls under:

(1) Volumes by integration

(2) Parametric equations

(3) Polar coordinates

(4) Sequences

(5) Series

(6) Power Series

Mathematics Homework Help

/in /by

MTH2401 UCI Probability and Statistics Intervals Questions

 

The 3 questions require using the R programming. all the instructions and the information needed are included in the file attached. Please answer the three questions in the first page, and provide screenshots of the answers from the R program. No future explanation needed.

Mathematics Homework Help

/in /by

Kwame Nkrumah University Statistics Regression Analysis for Stocks Worksheet

 

Statistics Regression analysis for stocks. Please read question carefully. Use the attached rubric as a guide, highlighted section. I will require both the word document write up as well as the excel file. You need to perform all steps in the regression analysis, as well as using graphs such as scatter plots and histograms (see rubric).

Mathematics Homework Help

/in /by

MATH 170 GC Power of Love Parametric Equations Question

 

Four sets of parametric equations are listed below.  Graph each set of equations on your graphing calculator using the parametric mode and the window shown.  Pick one of graphs, and write a story about the motion shown.  The story should be 1-2 paragraphs long, and t represents time.  Describe  one or more characters where this motion/path is key to the story.

Do not tell us which set of equations inspired your story!

M

otion #4 (use 0?t?6?,?5?x?40,?2?y?60?t?6?,?5?x?40,?2?y?6 )

x=2(t?sint)x=2(t?sin?t)

y=2(1?cost)y=2(1?cos?t)

Mathematics Homework Help

/in /by

PSYC 15 Deanza College Can Selfie Be An Addiction Research Analysis

 

For this assignment, please share your impressions of one of the following articles with controversial research findings:

Pick one:

1. Can selfie be an addiction?

https://www.psychologytoday.com/us/blog/in-excess/201810/social-media-selfies-and-addiction (Links to an external site.)

2. Does excessive screen time harm children?

https://www.sciencedirect.com/science/article/pii/S2211335518301827?via%3Dihub (Links to an external site.)

3. For those who are interested in romantic relationships with men, can you really tell if, “he’s not really into you.”?

https://www.psychologytoday.com/us/blog/valley-girl-brain/201109/6-signs-hes-just-not-you (Links to an external site.)

The Assignment:

1. Choose one of the above and comment on it in 5-8 sentences or a short paragraph.

Mathematics Homework Help

/in /by

JSU Function in Excel Lets You Calculate the Payment on A Load Discussion

 

I’m working on a Mathematics exercise and need support.

The pmt() function in Excel let’s you calculate what the payment on a load would be.  Suppose you finance a car purchase. Take your loan to be $24,000 with an annual interest rate of 16% compounded monthly and financed for 5 years. What would you need to put into the pmt function for rate, nper, and pv in order to correctly calculate your monthly payment?  What would you end up paying for the car in the end?

Mathematics Homework Help

/in /by

University of California Los Angeles 8 textbook questions about Linear and Nonlinear Systems of Differential Equations

 

Section 6.3: 15

Section 6.5: 1, 13

Section 6.6: 1

Section 6.8: 8

Exercise A

Show that the system

x_ = x y x(x2 + y2);

y_ = x + y y(x2 + y2)

is given in polar coordinates (x; y) = (r cos ; r sin ) by

r_ = r(1 r2);

_ = 1:

Draw the associated phase portrait.

1

Exercise B

For r < 1 draw the phase portrait of

r_ = r;

_ =

1

ln r

:

Calculate the associated vector eld f in cartesian coordinates. Note that (by denition)

f(0; 0) = (0; 0): Show that the phase portrait of the linearization at the origin is the phase

portrait of a stable star.

Remark. In this example f 2 C1(B1(0)) nC2(B1(0)); where B1(0) = f(x; y)jx2+y2 < 1g

is the ball of radius r = 1 around the origin. This example is due to Perron.

Exercise C

(a) Use index theory to show that the system

x_ = x(4 y x2);

y_ = y(x 1)

has no closed orbit. You may assume that a branch of the unstable manifold of (2; 0)

approaches (1; 3):

(b) Draw a phase portrait with all of the following properties:

(1) it diers from the phase portrait of (a) only for x > 0 and y > 0,

(2) it has a closed orbit,

(3) it has a stable spiral at (1; 3):

6.3.15 Consider the system r..= r(1.r2 ), …. =1.cos.. where r, .. represent polar

coordinates. Sketch the phase portrait and thereby show that the fixed point

r* .. 1, ..* .. 0 is attracting but not Liapunov stable.

6.5.1 Consider the system x….= x3 .x.

a) Find all the equilibrium points and classify them.

b) Find a conserved quantity.

c) Sketch the phase portrait.

6.5.13 (Nonlinear centers)

a) Show that the Duffing equation x….+x+..x3 = 0 has a nonlinear center at the

origin for all .. .. 0.

b) If .. .. 0, show that all trajectories near the origin are closed. What about

trajectories that are far from the origin?

Show that each of the following systems is reversible, and sketch the phase portrait.

6.6.1 x = y(1−x2 ), y =1−y2

6.8.8 A smooth vector field on the phase plane is known to have exactly three

closed orbits. Two of the cycles, say C1 and C2, lie inside the third cycle C3.

However, C1 does not lie inside C2, nor vice-versa.

a) Sketch the arrangement of the three cycles.

b) Show that there must be at least one fixed point in the region bounded by C1, C2,

C3.