Reproducible Research Quiz

Reproducible Research Quiz Answer. In this post you will get Quiz & Assignment  Answer Of Reproducible Research

 

Reproducible Research Quiz

Offered By ”Johns Hopkins University”

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Week 1 Quiz

 

1.
Question 1
Suppose I conduct a study and publish my findings. Which of the following is an example of a replication of my study?

1 point

  • I take my own data, analyze it again, and publish new findings.
  • An investigator at another institution conducts a study addressing a different scientific question and publishes her findings.
  • An investigator at another institution conducts a study addressing the same question, collects her own data, analyzes it separately from me, and publishes her own findings.
  • I give my data to an independent investigator at another institution, she analyzes the data and gets the same results as I originally obtained.

2.
Question 2
Which of the following is a requirement for a published data analysis to be reproducible?

1 point

  • The analysis is conducted on a variant of the Unix operating system.
  • The data analysis is conducted using R.
  • The full computer code for doing the data analysis is made publicly available.
  • The investigator’s final publication is made available free of charge.

3.
Question 3
Which of the following is an example of a reproducible study?

1 point

  • The study’s original authors re-run their computer code on their analytic data and confirm publicly that the findings match those of the published results.
  • The study’s analytic data and computer code for the data analysis are publicly available. When the code is run on the analytic data, the findings are identical to the published results.
  • The study’s analytic data are publicly available, but the computer code is not.
  • The study’s analytic data and computer code are not publicly available, but the study was simple enough to be repeated by an independent investigator.

4.
Question 4
Which of the following is a reason that a study might NOT be fully replicated?

1 point

  • The original study was very expensive and there is no money to repeat it in a different setting.
  • The original study was conducted by a well-known investigator.
  • The original study had null findings.
  • The original investigator does not want to make the analytic data available.

5.
Question 5
Which of the following is a reason why publishing reproducible research is increasingly important?

1 point

  • New technologies are increasing the rate of data collection, creating datasets that are more complex and extremely high dimensional.
  • The statistical methods for most studies can be accurately described using plain language.
  • Computing power is limited today, making it difficult to apply sophisticated statistical methods.
  • Most studies today are small-scale and easily replicated.

6.
Question 6
What is the role of processing code in the research pipeline?

1 point

  • It transforms the computational results into figures and tables.
  • It transforms the analytic data into computational results.
  • It conducts the statistical analysis of the primary outcome.
  • It transforms the measured data into analytic data.

7.
Question 7
Which is a goal of literate statistical programming?

1 point

  • Ensure that data analysis documents are always exported in PDF format.
  • Separate figures and tables from other data analytic summaries.
  • Require that data analysis summaries are always written in LaTeX.
  • Combine explanatory text and data analysis code in a single document.

8.
Question 8
What does it mean to weave a literate statistical program?

1 point

  • Transform the literate program into a machine readable code file.
  • Transform the literate program into a human readable document.
  • Compress the literate program so that it takes up less space.
  • Transform a literate program from R to python.

9.
Question 9
Which of the following is required to implement a literate programming system?

1 point

  • A Unix-based computer system.
  • A web server for publishing documents.
  • A documentation language like LaTeX.
  • A program that views PDF files.

10.
Question 10
What is one way in which the knitr system differs from Sweave?

1 point

  • knitr allows for the use of markdown instead of LaTeX.
  • knitr lacks features like caching of code chunks.
  • knitr is written in python instead of R.
  • knitr was developed by Friedrich Leisch.

 

 

Week 2 Quiz

1.
Question 1
Who created Markdown?

1 point

Hadley Wickham

Yihui Xie

Robert Gentleman

John Gruber

2.
Question 2
When writing a document in R Markdown, how do you denote the beginning of an R code chunk?

1 point

\verb|“`{r}|‘‘‘{r}

\verb|“`|‘‘‘

\verb|<rcode>|<rcode>

\verb|<code>|<code>

3.
Question 3
When using knitr, how do you indicate the height and width of a plot created in a code chunk?

1 point

Set the ‘fig.height’ and ‘fig.width’ options for the code chunk

Set the ‘size’ and ‘scale’ options for the code chunk

Set the ‘dpi’ option for the code chunk

Set the ‘height’ and ‘width’ options for the code chunk

4.
Question 4
With some code chunks, we may not want the output generated by the chunk to be rendered into HTML but would prefer to print the output verbatim. How can we specify this preference for a given code chunk?

1 point

Set the option \verb|highlight = TRUE|highlight = TRUE

Set the option \verb|message = FALSE|message = FALSE

Set the option \verb|results = “asis”|results = “asis”

Set the option \verb|tidy = FALSE|tidy = FALSE

5.
Question 5
When using knitr and R Markdown and producing output in HTML, why should you never edit the resulting HTML file?

1 point

Every time you knit() the R Markdown file, the HTML file will be overwritten

Editing the HTML file requires knowledge of a separate markup language.

The Markdown file generated by knitr is the appropriate file to edit.

The HTML file is not a text file.

 

 

Peer-graded Assignment: Course Project 1

 

PROMPT
Please submit the URL pointing to your GitHub repository containing the documents for this assignment. (NOTE: Please submit the URL for the entire repository, not for any individual files.)

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PROMPT
On a separate line, submit the SHA-1 hash identifier corresponding to the commit that contains the full submission (the identifier should be a string of 40 characters containing numbers 0-9 and letters a-f).

640582cf3b1ca33e07aa94fd6bd8b5a7f4549939

 

 

Week- 4

Peer-graded Assignment: Course Project 2

 

PROMPT
Please submit the URL from RPubs that points to your full report for this assignment.

NOTE: The URL for the RPubs document should begin with http:// (not https://)

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PROMPT
NOTE: If you are having trouble connecting with RPubs due to proxy-related or other issues, you can upload your final analysis document file as a PDF to Coursera instead.

 

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