How JustAnswer Works:

  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

Ask R.R. Jha Your Own Question

R.R. Jha
R.R. Jha, Tutor
Category: Homework
Satisfied Customers: 5470
Experience:  B.Tech
20870358
Type Your Homework Question Here...
R.R. Jha is online now
A new question is answered every 9 seconds

1. Describe the following variables as quantitative or qualitative,

Resolved Question:

1. Describe the following variables as quantitative or qualitative, and describe the scales of measurement.
A. The distance a student commutes from home to campus.
B. The rating of a stock as "strong buy," "buy," "hold," or "sell."
C. The percentage of alcohol (in volume) in Budweiser Beer.

2. A major airline wanted some information on those enrolled in their "frequent flyer" program. A sample of 10 members resulted in the following number of miles flown, to the nearest 1,000 miles, by each participant.
41, 22, 78, 54, 72, 97, 67, 64, 70, 55
A. Use 6 to 14 classes of equal width to create a table of frequencies for the "frequent flyer" data.
B. Draw a stem-and-leaf display for the "frequent flyer" data.
C. Find the first, second, and third quartiles of the "frequent flyer."

3. The following data consists of shoe sizes for six students:
9, 6.5, 8, 8.5, 7.5, 8.5
A. Find the mean shoe size for these six students.
B. Find the standard deviation of the shoe sizes.

4. The following table gives the two-way classification of 2,000 randomly selected employees from a city, based on gender and commuting time from home to work.

Commuting Time from Home to Work:
Less Than 30 Minutes 30 Minutes to One Hour More Than One Hour
Men: 524 455 221
Women: 413 263 124
_____________________________________________________
A. If one employee is selected at random from these 2,000 employees, find the probability that this employee
i. commutes for more than one hour.
ii. commutes for at least half an hour.
iii. commutes for at most one hour given that the employee is a woman.
B. (Are the events "man" and "commutes for more than one hour" independent? Explain.

5. The number of defects in a machine-made product is a random variable with the following probability distribution:
X P(x)
0 0.5
1 0.3
2 0.1
3 0.1
A. Find the probability that there are no more than 2 defects in a product.
B. Find the probability that the number of defects in a product is between 1 and 3, inclusive.
C. Find the probability that a randomly selected product has at most 1 defect.
D. Find the expected number of defects in a product.
E. Find the variance of the number of defects in a product.

6. Twenty percent of the patients treated by a new drug for AIDS show signs of improvement within six weeks. A random sample of five patients is selected and treated by the new drug.
A. Is this a binomial experiment?
B. Find the probability that 4 patients in the sample will show signs of improvement within six weeks.

7. The distance that one professional golfer can drive a golf ball has a normal distribution with a mean of 258 yards and a standard deviation of 6 yards.
A. What proportion of his drives exceed 280 yards in length?
B. How many yards should this golfer drive a ball so that the distance is among his longest 25%?

8. The average number of pounds of meat a person consumes a year is 212.3 pounds. Assume that the standard deviation is 20 pounds. If a sample of 50 individuals is selected, find the probability that the mean of the sample will be less than 210 pounds per year.

9. Suppose that a presidential candidate is favored by 51% of all eligible voters. What is the probability that in a random sample of 100 registered voters, less than 49% will favor that candidate?
Submitted: 1 year ago.
Category: Homework
Expert:  R.R. Jha replied 1 year ago.
Hi,
Welcome!

I'm working on your questions. I'd finish them and get back to you as soon as possible.


Thanks
Customer: replied 1 year ago.
Thank you!
Expert:  R.R. Jha replied 1 year ago.
Most welcome!
I hope I'd be done in about half an hour from now.
Expert:  R.R. Jha replied 1 year ago.
THIS ANSWER IS LOCKED!
You can view this answer by clicking here to Register or Login and paying $3.
If you've already paid for this answer, simply Login.
R.R. Jha, Tutor
Category: Homework
Satisfied Customers: 5470
Experience: B.Tech
R.R. Jha and 12 other Homework Specialists are ready to help you

JustAnswer in the News:

 
 
 
Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.
 
 
 

What Customers are Saying:

 
 
 
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
< Last | Next >
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
  • He answered my question promptly and gave me accurate, detailed information. If all of your experts are half as good, you have a great thing going here. Diane Dallas, TX
 
 
 

Meet The Experts:

 
 
 
  • Manal Elkhoshkhany

    Tutor

    Satisfied Customers:

    4520
    More than 5000 online tutoring sessions.
< Last | Next >
  • http://ww2.justanswer.com/uploads/BU/BusinessTutor/2012-2-2_115741_Kouki2.64x64.jpg Manal Elkhoshkhany's Avatar

    Manal Elkhoshkhany

    Tutor

    Satisfied Customers:

    4520
    More than 5000 online tutoring sessions.
  • http://ww2.justanswer.com/uploads/LI/lindaus/2012-6-10_04811_IMG20120609164157.64x64.jpg Linda_us's Avatar

    Linda_us

    Finance, Accounts & Homework Tutor

    Satisfied Customers:

    3121
    Post Graduate Diploma in Management (MBA)
  • http://ww2.justanswer.com/uploads/ComputersGuru/2010-02-13_051118_Photo41.JPG LogicPro's Avatar

    LogicPro

    Engineer

    Satisfied Customers:

    3035
    Expert in Java C++ C C# VB Javascript Design SQL HTML
  • http://ww2.justanswer.com/uploads/lanis/2009-4-1_233717_phput9xef_c1pm.jpg Lani S.'s Avatar

    Lani S.

    Tutor

    Satisfied Customers:

    2457
    Registered Nurse, Internet Researcher, Private Tutor
  • http://ww2.justanswer.com/uploads/chooser77/2009-08-18_162025_Chris.jpg Chris M.'s Avatar

    Chris M.

    M.S.W. Social Work

    Satisfied Customers:

    2341
    Master's Degree, strong math and writing skills, experience in one-on-one tutoring (college English)
  • http://ww2.justanswer.com/uploads/JawaadAhmed/2009-6-27_12137_SIs_SHadi.jpg F. Naz's Avatar

    F. Naz

    Chartered Accountant

    Satisfied Customers:

    1975
    Experience with chartered accountancy
  • http://ww2.justanswer.com/uploads/JK/jkcpa/2011-1-16_182614_jkcpa.64x64.jpg Bizhelp's Avatar

    Bizhelp

    CPA

    Satisfied Customers:

    1873
    Bachelors Degree and CPA with Accounting work experience
 
 
 

Related Homework Questions