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 Ryan Your Own Question

Ryan
Ryan, Engineer
Category: Calculus and Above
Satisfied Customers: 7315
Experience:  B.S. in Civil Engineering
40260889
Type Your Calculus and Above Question Here...
Ryan is online now
A new question is answered every 9 seconds

REQUESTING FOR RYAN I will resend you the attachment for

Resolved Question:

REQUESTING FOR RYAN

I will resend you the attachment for the STATS questions once it allows me to attach/
Submitted: 11 months ago.
Category: Calculus and Above
Expert:  Ryan replied 11 months ago.
Hi,

Thank you for the new request.

Please post the attachment at your convenience.

Thanks,

Ryan
Customer: replied 11 months ago.

Attachment: 2013-09-05_055140_2013-09-04_084854_stats_230___week_3.doc


Let me know if you need anything else. Thanks

Expert:  Ryan replied 11 months ago.
Hi,

There is a histogram that goes with problems 13, 14, 15, and 16, but it doesn't show up in this file. There is a line that says "EMBED MtbGraph.Document.15" that I suspect is a placeholder for the actual graph.

Can you take a screenshot of the histogram and post the screenshot image as a separate file?

I can't answer #13 or #14 without the histogram.

Also, since these are multiple choice questions, do you just need the final answers, or do you need the steps taken to get the solutions?

Thanks,

Ryan E
Customer: replied 11 months ago.
Ok I'll ck to see if there's a graph. For the multiple choice, just the answers... No need solutions
Expert:  Ryan replied 11 months ago.
Hi,

Ok, sounds great.

I have all of the other answers ready for you. I was just waiting on the histogram for #13 and #14.

If you want or need the other solutions now, just let me know. I can have it posted for you in just a few minutes.

Thanks,

Ryan
Customer: replied 11 months ago.
Sure ill get you the histograms in a few but yes, post the others
Expert:  Ryan replied 11 months ago.
Hi,

Ok, no problem. Here are the solutions for the other problems:

StatsSolutions

By the way, it is #14 and #15 that I can't answer yet, not #13 and #14 as I stated earlier.

Thanks,

Ryan
Customer: replied 11 months ago.

Attachment: 2013-09-05_235633_stats_week_3.docx

Attachment: 2013-09-05_235701_stats_week_3.docx


 


Let me know if you can open and read file. I've added three more questions, hope you don't mind answering. I'll be sure to include additional $. Thanks again!

Customer: replied 11 months ago.


Can you resend your Solutions another way, I can not open it from that mediafire from the computer I'm using.

Expert:  Ryan replied 11 months ago.
Hi,

Here are the solutions for the first set:


1. E. Both A and C

2. E. Both B and C

3. C. is as quantitative variable

4. B. Percentage of American adults who work full time

5. D. All of the above

6. A. the ratio scale

7. D. Observational studies

8. A. Experimental studies

9. B. the population

10. A. Given the prevalence of identity theft, are you reluctant to provide credit-card information online?

11. D. A scatter diagram

12. A. 27.78%

13. B. 45%

14. C. Right skewed

15. A. Median

16. B. $22,057

17. A. The mean would increase

18. C. the mean

19. B. 30%

20. A. 12.5

21. B. the pie chart

22. C. $56.99

23. A. $31.43

24. E. -1.24

25. C. -0.9265

Conference responses:

1. The 15th percentile corresponds to a left tail area of 0.15. The corresponding z-value obtained from Excel is -1.0364. The IQ corresponding to the 15th percentile is then:

-1.0364 = (x - 100) / 16

x = 100 - (1.0364)(16)

x = 83.42

2. The 75th percentile corresponds to a right tail area of 0.25. The corresponding z-value obtained from Excel is 1.6745. The IQ corresponding to the 75th percentile is then:

1.6745 = (x - 100) / 16

x = 100 + (1.6745)(16)

x = 126.79

I'll post the solutions for the additional problems shortly.

Thanks,

Ryan

Expert:  Ryan replied 11 months ago.
Hi again,

Here are the other solutions:

#19a. Prob = 334 / (187 + 334 + 256) = 334 / 777 ≈ 0.4299

#19b. Prob = (411 + 213) / (197 + 411 + 213) = 624 / 821 ≈ 0.7600

#19c. Prob = (334 + 411) / (187 + 197 + 334 + 411 + 256 + 213) = 745 / 1598 ≈ 0.4662

#19d. No, the relative proportions for each category are close to the same for each country:

US / yes: 187 / 777 ≈ 0.2407
Britain / yes: 197 / 821 ≈ 0.2400

US / no: 334 / 777 ≈ 0.4299
Britain / no: 411 / 821 ≈ 0.5006

US / unsure: 256 / 777 ≈ 0.3295
Britain / unsure: 213 / 821 ≈ 0.2594

#25a. P(M or F) = P(M) + P(F) - P(MF) = 0.56 + 0.42 - 0.24 = 0.74

#25b. P(neither M or F) = 1 - P(M or F) = 1 - 0.74 = 0.26


#52a. z = (1000 - 1550) / 300 = -1.8333. P(z < -1.8333) = 0.0334

#52b. From part a, z1 = -1.8333. z2 = (2000 - 1550) / 300 = 1.5
P(1000 < x < 2000) = P(-1.8333 < z < 1.5) = P(z < 1.5) - P(z < -1.8333) = 0.9332 - 0.0334 = 0.8998

#52c. x = µ + zσ = 1550 + 1.645(300) = 2043.5
Since the number of accidents would be a discrete value, this answer should be rounded to 2044.

As always, please feel free to ask if you have questions about any of these solutions.

Thanks,

Ryan
Ryan, Engineer
Satisfied Customers: 7315
Experience: B.S. in Civil Engineering
Ryan and 2 other Calculus and Above 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:

 
 
 
  • SusanAthena

    Master's Degree

    Satisfied Customers:

    98
    Tutor for Algebra, Geometry, Statistics. Explaining math in plain English.
< Last | Next >
  • http://ww2.justanswer.com/uploads/homeworklady/2008-11-24_125231_susannewavatar.jpg SusanAthena's Avatar

    SusanAthena

    Master's Degree

    Satisfied Customers:

    98
    Tutor for Algebra, Geometry, Statistics. Explaining math in plain English.
  • http://ww2.justanswer.com/uploads/ED/educatortech/2012-6-7_1256_williams4.64x64.jpg Mr. Gregory White's Avatar

    Mr. Gregory White

    Master's Degree

    Satisfied Customers:

    93
    M.A., M.S. Education / Educational Administration
  • http://ww2.justanswer.com/uploads/CO/CosumelEyes/2012-5-4_4923_Profile.64x64.jpg Ray Atkinson's Avatar

    Ray Atkinson

    Bachelor's Degree

    Satisfied Customers:

    45
    Degrees in Math, Education and Accounting, years and years of tutoring.
  • http://ww2.justanswer.com/uploads/SO/sonofGauss/2012-6-6_20151_PortraitLHW.64x64.jpg JACUSTOMER-yrynbdjl-'s Avatar

    JACUSTOMER-yrynbdjl-

    Master's Degree

    Satisfied Customers:

    42
    I have a MS in Mathematics and I have taught Mathematics for 10 years at the college level.
  • http://ww2.justanswer.com/uploads/dhouse1940/2010-09-02_133023_DSCN2406.jpg dhouse1940's Avatar

    dhouse1940

    Master's Degree

    Satisfied Customers:

    33
    BS mathematics, MS biostatistics, 35+ yrs designing & analyzing biological experiments.
  • http://ww2.justanswer.com/uploads/AR/arubin9/2012-2-4_42617_ArthurRubinedit.64x64.jpg Dr Arthur Rubin's Avatar

    Dr Arthur Rubin

    Doctoral Degree

    Satisfied Customers:

    32
    Ph.D. in Mathematics, 1978, from the California Institute of Technology, over 20 published papers
  • http://ww2.justanswer.com/uploads/DO/Donbacongamer/2012-3-6_2337_mathmaster.64x64.jpg Don's Avatar

    Don

    Master's Degree

    Satisfied Customers:

    29
    M.S. Astronautical Engineering. Math/Sci/Comp Tutor