100% satisfaction guarantee Immediately available after payment Both online and in PDF No strings attached
logo-home
Elementary Statistics (STATs 2023) Final_Review_STA2023_St_Petersburg_College $14.99   Add to cart

Exam (elaborations)

Elementary Statistics (STATs 2023) Final_Review_STA2023_St_Petersburg_College

 5 views  0 purchase

Elementary Statistics (STATs 2023)

Preview 2 out of 12  pages

  • September 7, 2024
  • 12
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
All documents for this subject (21)
avatar-seller
YourAssignmentHandlers
: Quiz Submissions - Final Review (Bonus) - STA2023 Elementary Statistics Mode:(Online) Class#:2243 Instructor:Kennedy - St Petersburg College 4/30/20, 7:34 PM




Quiz Submissions - Final Review (Bonus)
Kaitlyn Oquendo (username: koquen1)

A!empt 2
Wri!en: Apr 30, 2020 5:08 PM - Apr 30, 2020 7:31 PM
Submission View

Your quiz has been submi!ed successfully.

Ques"on 1 point

State the null and alterna"ve hypotheses you would use to test the following
situa"on.

The average "me it takes for a person to experience pain relief from a certain pain
reliever is 15 minutes. A new ingredient is added to help speed up pain relief and an
experiment is conducted to test whether the new product does indeed speed up pain
relief.

What are the appropriate null and alterna"ve hypotheses for the experiment?


H0 : μ = 15
H1 : μ > 15

H0 : μ = 15
H1 : μ ≠ 15

H0 : μ = 15
H1 : μ < 15

Ques"on 2 point

Determine the specified confidence interval.

It has been estimated, with 90% confidence, the proportion of Americans who go out
shopping on Black Friday is 0.40 with a margin of error equal to 0.04.
Determine the resulting 90% confidence interval for the proportion of Americans who
go out shopping on Black Friday.


(0.40 , 0.44)


(0.36 , 0.40)


(0.36 , 0.44)


(0.38 , 0.42)


(0.86 , 0.94)


Ques"on 3 point
Select the most appropriate response.

What type of error is made if you fail to reject the null hypothesis when the null hypothesis is actually false?



Type II error


Type I error


cri"cal error


significant error


Ques"on 4 point

For the given significance test, explain the meaning of a Type I error.

https://mycourses.spcollege.edu/d2l/lms/quizzing/user/quiz_submissions_attempt.d2l?qi=797728&ai=10036821&isInPopup=0&isprv=0&dnb=0&cfql=0&d2l_body_type=1&ou=234782 Page 1 of 12

, : Quiz Submissions - Final Review (Bonus) - STA2023 Elementary Statistics Mode:(Online) Class#:2243 Instructor:Kennedy - St Petersburg College 4/30/20, 7:34 PM



A metropolitan city is trying to bring its smog level into federal guidelines and currently
has 12% pollutants per 10,000 volume of air. The city comes up with a new policy
where city employees are encouraged to use city transporta"on to and from work. An
independent agency, hired by the city, runs a test on the air in order to determine if
the new policy has had the desired effect.

The hypotheses are:

H0 : p = 0. 12
H1 : p < 0. 12

Explain the meaning of a Type I error.


Concluding that the smog-level has decreased when it actually has not.



Not concluding that the smog-level has increased when it actually has.


Concluding that the smog-level has increased when it actually has not.


Not concluding that the smog-level has decreased when it actually has.


Ques"on 5 point

State your conclusion to the hypothesis test.

Is achieving a basic skill level in a subject independent to the loca"on of the school? A
random sample of students categorized by the loca"on of school and the number
achieving basic skills in three subjects is shown in the table.

Subject
Loca"on of School Reading Math Science
Urban 43 42 38
Suburban 63 66 65
Conduct a chi-square test of independence at the 1% significance level to test whether

the two variables are independent and state your conclusion.

Hint: the test sta"s"c is: χ 2 = 0. 30

There is sufficient sample evidence to suggest that skill level in a subject is
dependent of loca"on.


There is sufficient sample evidence to suggest that skill level in a subject is
independent of loca"on.


There is not sufficient sample evidence to suggest that skill level in a subject is
dependent of loca"on.


There is not sufficient sample evidence to suggest that skill level in a subject is
independent of loca"on.


Cannot be determined.


Ques"on 6 point

Find the correla"on coefficient.

A group of persons filled in a ques"onnaire their age and the number of states they
visited. The results are recorded in the table below.




https://mycourses.spcollege.edu/d2l/lms/quizzing/user/quiz_submissions_attempt.d2l?qi=797728&ai=10036821&isInPopup=0&isprv=0&dnb=0&cfql=0&d2l_body_type=1&ou=234782 Page 2 of 12

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 YourAssignmentHandlers. Stuvia facilitates payment to the seller.

Will I be stuck with a subscription?

No, you only buy these notes for $14.99. You're not tied to anything after your purchase.

Can Stuvia be trusted?

4.6 stars on Google & Trustpilot (+1000 reviews)

71498 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
$14.99
  • (0)
  Add to cart