100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Graded quiz $10.96   Add to cart

Exam (elaborations)

Graded quiz

 3 views  0 purchase
  • Course
  • Institution
  • Book

This Graded quiz counts towards the final term mark, and is also preparation for the final exams.

Preview 2 out of 11  pages

  • May 24, 2021
  • 11
  • 2020/2021
  • Exam (elaborations)
  • Questions & answers
avatar-seller
10/18/2018 Graded Quiz Unit 6

MATH 1281 Statistical Inference - Term 1, 2018-2019
Home ► My courses ► MATH 1281 - AY2019-T1 ► 11 October - 17 October ►
Graded Quiz Unit 6


Started on Wednesday, 17 October 2018, 6:36 PM
State Finished
Completed on Wednesday, 17 October 2018, 8:04 PM
Time taken 1 hour 27 mins
Marks 16.00/20.00
Grade 80.00 out of 100.00

Information




In Figure 2 you may nd a scatter plot with 10 points and 3 lines. Three of
the points are marked by the letters a, b, and c. The lines are marked by
the numbers 1, 2, and 3. The following 2 questions refer to this scatter plot.




Information
Fit a regression model to the relation between "curb.weight" as a response
and "engine.size" as an explanatory variable. Both variables belong to the
data set "cars.csv". The following 3 refer to the tted model.




https://my.uopeople.edu/mod/quiz/review.php?attempt=1453891 1/11

, 10/18/2018 Graded Quiz Unit 6
Question 1 The estimated value of the slope is equal to: (Give an answer of the form
Correct x.xxx with 3 signi cance digits)
Mark 1.00 out of
1.00 Answer: 10.635




The correct answer is: 10.6354



Question 2 Test the null hypothesis the intercept is equal to 0. This null hypothesis is:
Correct

Mark 1.00 out of Select one:
1.00 a. Not rejected with a signi cance level of 5%.

b. Rejected with a signi cance level of 5%, but not with a signi cance level of
1%.

c. Rejected with a signi cance level of 1%, but not with a signi cance level of
0.1%.

d. Rejected with a signi cance level of 0.1%




The correct answer is: Rejected with a signi cance level of 0.1%



Question 3 Use the function "con nt" in order to construct a con dence interval to the
Correct slope of the regression line. The value 0:
Mark 1.00 out of
1.00 Select one:
a. Belongs to the 95% con dence interval.

b. Does not belongs to the 95% con dence interval.




The correct answer is: Does not belongs to the 95% con dence interval.




https://my.uopeople.edu/mod/quiz/review.php?attempt=1453891 2/11

The benefits of buying summaries with Stuvia:

Guaranteed quality through customer reviews

Guaranteed quality through customer reviews

Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.

Quick and easy check-out

Quick and easy check-out

You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.

Focus on what matters

Focus on what matters

Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!

Frequently asked questions

What do I get when I buy this document?

You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.

Satisfaction guarantee: how does it work?

Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.

Who am I buying these notes from?

Stuvia is a marketplace, so you are not buying this document from us, but from seller cliftonafrika. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $10.96. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

71947 documents were sold in the last 30 days

Founded in 2010, the go-to place to buy study notes for 14 years now

Start selling
$10.96
  • (0)
  Add to cart