Download the dataset to your computer and read it into r using the read.csv() function.

Published by Jeannie R. Ferrell

Dec 8, 2022

s

Struggling with a similar assignment? Don’t know where to start? Don’t have time to work on this? Get a high-quality paper written for you from scratch – PLAGIARISM FREE, guaranteed to get you a good grade. To get started, please click on the Submit Your Instructions at the bottom of the page.

To complete this homework assignment, download the homework template PS2_Template.Rmd and
complete the whole assignment using R Markdown. Submit the final PDF you created using Knit
PDF. If you get an error message compiling–knitting–your assignment as PDF directly, you can
compile the document using Knit HTML, open it in a browser, and then use your browser’s Print
as PDF function. PDF is the only acceptable format for homework submissions.
1 Linear Regression 1 [Applied]
The Data Sets module folder on Canvas contains a dataset called ps2_ex1. The dataset contains
outcome y and predictor variables x1, x2 for 40 data points. There are an additional 20 obersvations
with values for predictor variables but no observed outcome. Download the dataset to your computer
and read it into R using the read.csv() function. [5 points]
1. Use R to fit a linear regression model predicting y from x1, x2, using the first 40 data points
in the file. Summarize the inferences (i.e., p-values) and check the fit of your model (i.e.,
R2
). Explain your findings. Hint: R will automatically detect that y is NA for the last 20
observations and will automatically drop them while running lm() – so there is nothing specific
you need to do. You can confirm this by looking at the “number of observations” shown in
the summary() output. [2 points]
2. Display the estimated model graphically (Hint: numerical variables make great candidates for
for x/y axes; categorical variables can be mapped to colors.) [1 point]
3. Make predictions for the remaining 20 data points in the file that have missing observations.
How confident do you feel about these predictions? [2 points]
2 Linear Regression 2 [Applied]
Simulate two variables that are statistcally independent of each other to see what happens when we
run a regression of one on the other. [5 points]
1. First, generate 1,000 data points drawn randomly from a normal distribution with mean = 1
and standard deviaiton = 2 by typing var1

n

Need Writing Help? Our writing specialists are here 24/7, every day of the year, ready to support you! Instantly chat with an online tutor below or click here to submit your paper instructions to the writing team.

[jetpack-related-posts]

More than just an assignment.

GET THE GRADES YOU DESERVE | A OR A- GUARANTEED
NO MORE SLEEPLESS NIGHTS DOING RESEARCH
NO MORE LATE POINTS DEDUCTIONS 
GET A QUALITY PAPER SENT TO YOUR EMAIL
GET GOOD GRADES ON YOUR ASSIGNMENTS
Explore Now →

Who is this homework service for?

* If you are having a really hard class and want to get through it, then this is for you.

* If you have a medical emergency or someone close to you has a medical emergency and you don’t think you’ll be able to turn your assignment on time, this is definitely a service you could use.

* You can use us if you are having a tough Professor who won’t give you the grades you deserve.

* If you have a tight work schedule and you are getting points deducted for not submitting assignments on time.

* English might not be your first language and you feel like you are being left behind in class because of it.

* If you have a large project coming up and don’t think you have enough time to get it done well, definitely reach out to us.

TALK TO SUPPORT
{

Super stoked you are checking us out! We would like to help you with your assignment. We just need a few things from you:

* The full assignment instructions as they appear on your school account.

* If a Rubric is present, make sure to attach it.

* Any relevant weekly readings or learning resources.

* Include any special announcements or emails you might have gotten from your Professor regarding your assignment.

* Any templates or additional files required to complete the assignment.

If your assignment is somewhat complex and you need to explain it, please don’t hesitate to reach out to me via live chat. 

 

FAQ

Frequently asked questions

How soon can I get my paper done?

It depends with your deadline. If you need your paper completed in 3 hours, we will deliver it in that time. All you need to do is indicate your deadline in our custom order page here. Alternatively, if you are sending us your instructions via email, please be sure to indicate your deadline.

Will it be completely original? I don't want to be caught in a case of Academic Integrity Violation.

We are as paranoid as you are. Maybe even more! And we understand that the greatest sin you can commit in your academic journey is plagiarizing your academic work. To that end, we have made sure that we check and double-check our papers using high quality plagiarism detection tools such as SafeAssign and Turnitin before submitting the paper to you.

Who is my writer? Is he/she a native English Speaker?

All our writers are native English Speakers. That is not to say that ESL writers are not good, we just prefer hiring native writers because we want the very best people working on your paper. This might mean paying a little bit more for your paper as opposed to when you pay a foreign company whose writers are non-native English Speakers.

What if I need revisions? Will your charge additional for this?

Of course not! If you do happen to require a revision on your paper, our team will handle it for you free of charge. Matter of fact, we won’t rest till you are happy with your paper. So, ask for as many revisions as you need, it’s completely FREE!

Will you give me my money back if I don't like my paper?

We have very few instances where we delivered a paper that a client didn’t fall in love with. But if it so happens that you don’t like your paper for any reason whatsoever, we’ll refund your money back no questions asked.

I have more assignments after this, can you help me with those too?

Of course! And what’s even better is that we can reserve a writer permanently to work on your entire class. This comes in handy for projects which build up on each other and where you need just one writer, one writing style.

I got my order information wrong, can I change that?

Yes you can. Just reach out to our support team via email (support@essaynook.com) or live chat here and they’ll help you change the instructions.

Can I place an order via email instead of going through the order page?

Yes you can. Email Anna at anna@essaynook.com, she’s in charge of our sales team. Alternatively, you can talk to our Live Chat team here and request to speak to Anna.

Trusted by Thousands of Students

Delivering quality assignments since 2007