Login|Contact Us
Question and Answer

Homework

Ask a Homework Question, Get an Answer ASAP!

  • Ask A Question
  • Browse Answers
  • Meet The Experts
  • How JustAnswer Works

Statistic formula needed to solve the follow question need

 
Steve's Avatar
  • Answered by:Steve
  • Teacher
  • Positive Feedback: 94.6 %
  • Accepted Answers: 82
Verified Expert
in Homework

Recent Feedback

Positive
Thanks for the help. Looks like I was almost there.
Positive
Thanks again!
Positive
Thank you again
Positive
Thank you again for the help..
Positive
I wish you could sit next to me for the 50 question that I have to do this...
Positive
Steve was great, but there are 2 still unanswered questions, that I still need...
Positive
Your amazing with math thank you so much for all of you assistance.
Positive
Thank you so much I have been working on that problem for an hour
Positive
Nice

Customer Question

Statistic formula needed to solve the follow question need help ASAP!

I've done research and need an hypothesis statistic test calculated and COMPUTE PROBABILITY OF TEST STATISTIC OR REJECTION REGION.

Here is my research along with my hypothesis' alternative and null

Problem Question
Will insects vacate a porch, primarily wasps if the ceiling is painted sky blue?
Alternative Hypothesis
Painting a ceiling sky blue will deter insects from building nests on the porch.
Null Hypothesis
Sky blue ceiling doesn’t deter insects from building nests on the porch.
Prediction
If a porch ceiling or any other is painted blue, then insects would still build nests at the same degree as they would do with any other color.
Controlled Experimentation Method
Fifteen houses with similar designs were selected in a large southern suburban neighborhood. Seven paints with different colors – one of them being sky blue with one other being an outdated sky blue milk paint containing lye. All paints except for the milk paint were purchased from the same manufacturer which should ascertain that no difference arises due to chemical composition of the paint. With owners’ permission, porch ceiling of five randomly selected houses were painted with sky blue. Congruently on the same side of the rode and additional five randomly selected houses were painted with sky blue milk paint. Porch ceilings in each of the remaining five houses were painted with one of the five leftover colors. After two years, porches were observed for number of wasp nests.
Results
Following number of wasp nests were observed in porches
Porches with blue-colored ceiling – 0, 2, 3, 1, 1
Porches with milk paint blue-colored ceiling – 0, 0, 1, 2, 2
Porches with other color ceiling – 3, 2, 2, 1, 1
A hypothesis test was conducted to find if statistically significant difference existed between two group means.

Submitted: 355 days and 11 hours ago.
Category: Homework
Value: $20
Status: CLOSED
Picture
Expert:  Steve replied 355 days and 10 hours ago.

Hi,

I see 3 groups at the end

Tell me the 2 groups where you need the test

Steve

Customer replied 355 days and 10 hours ago.

Would you do the test twice. Line 1 vs. Line 3, and Line 2 vs. Line 3?

Picture
Expert:  Steve replied 355 days and 10 hours ago.

OK,

so you want

Test 1)

Porches with blue-colored ceiling – 0, 2, 3, 1, 1
vs
Porches with other color ceiling – 3, 2, 2, 1, 1

And

Test 2)

Porches with milk paint blue-colored ceiling – 0, 0, 1, 2, 2
vs
Porches with other color ceiling – 3, 2, 2, 1, 1

Steve

Customer replied 355 days and 10 hours ago.

yes please

Picture
Expert:  Steve replied 355 days and 10 hours ago.

Ok,

I am working on them, i will put the first test soon

Steve

Customer replied 355 days and 10 hours ago.

ok thank you.

Accepted Answer

Picture
Expert:  Steve replied 355 days and 10 hours ago.

Test 1)

Porches with blue-colored ceiling – 0, 2, 3, 1, 1
vs
Porches with other color ceiling – 3, 2, 2, 1, 1

Ho: u1=u2
Ha: u1≠u2

x-bar-1= 1.4
x-bar-2 =0.942

sd1=1.14
sd2=0.837

(sp)^2 = [(5-1)(sd1)^2+(5-1)(sd2)^2]/(10-2)=1.000042249

Statistic = t = (1.14-0.837)/sp√(1/5+1/5) =0.724

Critical values: -t(0.025,8)= -2.306 and t(0.025,8)=2.306

Critical region: {t/t<-2.306 or t>2.306}

Decision: Since the statistic value does not fails into the critical region

we do not reject Ho

Thanks

Steve

Expert TypeTeacher
Category: Homework
Pos. Feedback: 94.6 %
Accepts: 82
Answered: 4/30/2012

Experience: I teach Calculus and Probability in a University since 1994

Ask this Expert a Question >
Customer replied 355 days and 10 hours ago.

Test one looks great thanks!

Picture
Expert:  Steve replied 355 days and 10 hours ago.

Ok,

I will post the second one in a moment, can you accept the previous one ?

Steve

Customer replied 355 days and 9 hours ago.

10-4 first one is accepted

Picture
Expert:  Steve replied 355 days and 9 hours ago.

Ok,

I am working on the second test

Steve

Picture
Expert:  Steve replied 355 days and 9 hours ago.

I had some mistakes with test 1)

I will fix it now

Steve

Customer replied 355 days and 9 hours ago.

ok

Accepted Answer

Picture
Expert:  Steve replied 355 days and 9 hours ago.

Test 1)

Porches with blue-colored ceiling – 0, 2, 3, 1, 1
vs
Porches with other color ceiling – 3, 2, 2, 1, 1

Ho: u1=u2
Ha: u1≠u2

x-bar-1= 1.4
x-bar-2 =1.8

sd1=1.14
sd2=0.837

(sp)^2 = [(5-1)(sd1)^2+(5-1)(sd2)^2]/(10-2)=1.000042249

Statistic = t = (1.4-1.8)/sp√(1/5+1/5) =-0.632

Critical values: -t(0.025,8)= -2.306 and t(0.025,8)=2.306

Critical region: {t/t<-2.306 or t>2.306}

Decision: Since the statistic value does not fails into the critical region

we do not reject Ho

Thanks

Steve

Expert TypeTeacher
Category: Homework
Pos. Feedback: 94.6 %
Accepts: 82
Answered: 4/30/2012

Experience: I teach Calculus and Probability in a University since 1994

Ask this Expert a Question >
Picture
Expert:  Steve replied 355 days and 9 hours ago.

I am working on the second now

Steve

Customer replied 355 days and 9 hours ago.

When the second one is done I will add an additional bonus that wasn't added into the first accept

Accepted Answer

Picture
Expert:  Steve replied 355 days and 9 hours ago.

THIS ANSWER IS LOCKED!

You need to spend $3 to view this post. Add Funds to your account and buy credits.

Expert TypeTeacher
Category: Homework
Pos. Feedback: 94.6 %
Accepts: 82
Answered: 4/30/2012

Experience: I teach Calculus and Probability in a University since 1994

Ask this Expert a Question >
 
Tweet

Tutors are Online Right Now

Ask Your Question Now
Homework Questions Date Submitted
For RRJha 4/18/2013
I have been hired to set up a local area network with a firewall 4/18/2013
PR-503 4/18/2013
a man averaged 50mph traveling from Denver to Minneapolis. 4/17/2013
You have answered this in the past I saw. Use the JavaScript 4/17/2013
Can someone help with this? I need to be able to take this 4/17/2013
Chris M 4/17/2013
so that was worth 50 dollars this 20 questions 4/17/2013
hi can you help me in this example please http://wikisen 4/17/2013
logicPro only 4/17/2013
RSS
Next 10 >
Ask A Tutor
Type Your Homework Question Here...
characters left:

Top Homework Experts

See More Tutors

In The News

Nbc
Washington Post
New York Times
Cnn
Learn More

How It Works

  • Ask an Expert
  • Get a Professional Answer
  • Ask Followup Questions
  • 100% Satisfaction Guarantee
Learn More
close
Find Expert answers related to your question.
Sign up using email
We will never post anything without your permission.
Already have an account? Sign in

Ask a Tutor

Get a Professional Answer. 100% Satisfaction Guaranteed.
76 Tutors are Online Now
Type Your Homework Question Here...
characters left:
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.
Truste
Contact Us | Terms of Service | Privacy & Security | About Us | Our Network
© 2003-2013 JustAnswer LLC
  • Pearl.com
  • JustAnswer UK
  • JustAnswer Germany
  • JustAnswer Spanish
  • JustAnswer Japan