Math Homework

Ask Math Questions. Get Help With Your Math Homework

Ask an Expert,
Get an Answer ASAP!

A distribution has a positive skew, calculated at +1.0. Estimate…

Customer Question
A distribution has a positive...
A distribution has a positive skew, calculated at +1.0. Estimate the size of the standard error of skewness.
A. >0.5
B. <0.5
C. About 2.0
D. None of the above

An environmental group wants to do a study that would demonstrate with a 99% certainty the the percentage of a certain kind of tree has declined from a known population. The variable under study is the number of this kind of tree acre. They also want to minimize costs by sampling trees from only a few acres. You consult with them before they do the study. WHat is your best advice?

A. They should use the t table for small samples
B. They should use the 99% confidence interval
C. With a small tree sample and a high confidence interval they are not likely to get the results for which they hope.
D. None of the above.
Submitted: 8 years ago.Category: Math Homework
Show More
Show Less
Ask Your Own Math Homework Question
Answered in 4 minutes by:
6/10/2010
Math Tutor or Teacher: Scott, MIT Graduate replied 8 years ago
Scott
Scott, MIT Graduate
Category: Math Homework
Satisfied Customers: 17,710
Experience: Over 13,000 accepts & 100% feedback in the old math category
Verified

Sure!

 

What is the sample size for the first one?

 

Let me know,

Scott

Ask Your Own Math Homework Question
Customer reply replied 8 years ago
To estimate the error of skewness? It doesn't give a sample size.
Math Tutor or Teacher: Scott, MIT Graduate replied 8 years ago

Is it given somewhere else? Because that's what you need for the formula for SES.

-Scott

Ask Your Own Math Homework Question
Customer reply replied 8 years ago
No, That is the total question just "a distribution has a positive skew" No pop size or anything which made me believe there should be an option of "not enough info" There is a none of the above, but that's it.
Math Tutor or Teacher: Scott, MIT Graduate replied 8 years ago

Ok, it's an approximation! Skew is typically larger than 2 ses's, so ses must be less than 0.5:

B. <0.5

 

An environmental group wants to do a study that would demonstrate with a 99% certainty the the percentage of a certain kind of tree has declined from a known population. The variable under study is the number of this kind of tree acre. They also want to minimize costs by sampling trees from only a few acres. You consult with them before they do the study. WHat is your best advice? A. They should use the t table for small samples B. They should use the 99% confidence interval C. With a small tree sample and a high confidence interval they are not likely to get the results for which they hope. D. None of the above.

 

The population standard deviation is known, so it can't be A

It shouldn't be B, since we want 99% that it has declined, not 99% that it's different.

If C was true, then statistics wouldn't have any purpose!

So it's D.

 

 

Let me know if you have any questions,

Scott

Scott
Scott, MIT Graduate
Category: Math Homework
Satisfied Customers: 17,710
Experience: Over 13,000 accepts & 100% feedback in the old math category
Verified
Scott and 87 other Math Homework Specialists are ready to help you
Ask your own question now
Customer reply replied 8 years ago
Ummm in my life statistics doesn't have a purpose. Unless you count frustrating me, costing time and money, and all that other nonsense. My mantra? C=commencement. Honestly Scott God bless people like you who can help people like me but my brain doesn't speak math.
Math Tutor or Teacher: Scott, MIT Graduate replied 8 years ago

LOL!

-Scott

Ask Your Own Math Homework Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a math tutor or teacherLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Scott Your Own Question
Scott
Scott
Scott, MIT Graduate
Category: Math Homework
Satisfied Customers: 17,710
17,710 Satisfied Customers
Experience: Over 13,000 accepts & 100% feedback in the old math category

Scott is online now

A new question is answered every 9 seconds

How JustAnswer works:

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

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

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!!!!

AlexLos 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.

GPHesperia, CA

I couldn't be more satisfied! This is the site I will always come to when I need a second opinion.

JustinKernersville, 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.

EstherWoodstock, 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.

RobinElkton, 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.

DianeDallas, TX

< Previous | Next >

Meet the Experts:

Mr. Gregory White

Mr. Gregory White

Master's Degree

92 satisfied customers

M.A., M.S. Education / Educational Administration

JACUSTOMER-yrynbdjl-

JACUSTOMER-yrynbdjl-

Master's Degree

49 satisfied customers

I have taught college Mathematics for the past 10 years.

SusanAthena

SusanAthena

Master's Degree

41 satisfied customers

Tutor for Algebra, Geometry, Statistics. Explaining math in plain English.

Dr Arthur Rubin

Dr Arthur Rubin

Doctoral Degree

38 satisfied customers

Ph.D. in Mathematics, California Institute of Technology

mhasan420

mhasan420

Master's Degree

29 satisfied customers

BA Maths, Oxford

Don

Don

Master's Degree

17 satisfied customers

M.S. Astronautical Engineering. Math/Science/Comp Tutor

judybailey61

judybailey61

Bachelor's Degree

17 satisfied customers

20 years teaching mathematics

< Previous | Next >

Related Math Homework Questions
having some trouble with some homework questions... A researcher
having some trouble with some homework questions... A researcher wants to study the spending habits of customers of a local shopping mall. The mall manager claims that the average spending per custome… read more
Stevewh
Stevewh
Teacher
Bachelor's Degree
612 satisfied customers
1) Unstructured interviews are best used for A. measuring
1) Unstructured interviews are best used for A. measuring worker productivity B. solving manufacturing defect problems C. assessing management effectiveness D. asking individualized questions with no … read more
Stevewh
Stevewh
Teacher
Bachelor's Degree
612 satisfied customers
We want to estiamte a proportion p. What is the minimal sample
We want to estiamte a proportion p. What is the minimal sample size needed for a 95% confidence interval to have a a maximal margin of error of 0.06 if a preliminary estimate for p is 0.8? Let x be a … read more
Osbert12
Osbert12
Master\u0027s Degree
412 satisfied customers
1. Consider a normal population with µ = 25 and σ = 7.0. (A)
1. Consider a normal population with µ = 25 and σ = 7.0. (A) Calculate the standard score for a value x of 22. (B) Calculate the standard score for a randomly selected sample of 30 with = 22. (C) Expl… read more
Scott
Scott
MIT Graduate
Master's Degree
17,710 satisfied customers
11. (TCO 3) The ages of 24 employees in a company are listed
11. (TCO 3) The ages of 24 employees in a company are listed below: Use the stem & leaf plot to determine the shape of the distribution. Choose the best answer. 20,22,26 30,34,35,36,38 40,42,43,44,45,… read more
mhasan420
mhasan420
Master's Degree
Bachelor's Degree
29 satisfied customers
Statistics- Detail only needed on the H0, Ha questions. Tx
Question 1 Which of the following probability experiments would result in a discrete random variable? a. Observing the number of minutes required to walk a mile b. Observing the number of light bulbs … read more
dhouse1940
dhouse1940
Retired
Master\u0027s Degree
46 satisfied customers
10. (TCO 4) A travel agency offers 4 different vacation packages
10. (TCO 4) A travel agency offers 4 different vacation packages to Europe. Their net profit for package 1 is $500, for package 2 it is $750, for package 3 it is $900, and for package 4 it is $1,500. … read more
Chirag
Chirag
Master\u0027s Degree
55 satisfied customers
1. Which of the following would most likely” be a better measure
1. Which of the following would “most likely” be a better measure of a set of observations describing the incomes of a population? A. the mean B. the median C. the mode D. the range Use the following … read more
R.R. Jha
R.R. Jha
Bachelor\u0027s Degree
150 satisfied customers
10. (TCO 4) A local charity sells 100 raffle tickets for $20
10. (TCO 4) A local charity sells 100 raffle tickets for $20 each as part of a fund raiser. There is one Grand Prize of $500, one First Prize of $100, and 8 Second Prizes of $50. Find the expected win… read more
Osbert12
Osbert12
Master\u0027s Degree
412 satisfied customers
From 500 observations made over a two-week (80-hour) period
From 500 observations made over a two-week (80-hour) period the following status of a machine is: State of Observation Number of observations 1 Machine working or available for work 440 2 Machine down… read more
SusanAthena
SusanAthena
Master's Degree
Master's Degree
41 satisfied customers
Which of the following statements is consistent with the Central
Which of the following statements is consistent with the Central Limit Theorem? A. Means of samples of n=30 from an exponential distribution will be approximately normally distributed. B. When we know… read more
Sandhya_sharma
Sandhya_sharma
Master\u0027s Degree
560 satisfied customers
9) A child was born into the Doe family each year for five
9) A child was born into the Doe family each year for five consecutive years. What is the variance of the ages of the Doe children? A. 2.5 B. 4.6 C. 2.0 D. 1.4 10) A multiple-choice test has 20 questi… read more
mhasan420
mhasan420
Master's Degree
Bachelor's Degree
29 satisfied customers
for chirag Crop researchers plant 15 plots with a new varitey
for chirag: Crop researchers plant 15 plots with a new varitey of corn, the yield in bushels per acre are given below: 138 139.1 113.0 132.5 140.7 109.7 118.9 134.8 109.6 127.3 115.6 130.4 130.2 111.7… read more
Chirag
Chirag
Master\u0027s Degree
55 satisfied customers
Statistics T F 1. A simple random sample is formulated
Statistics: T F 1. A simple random sample is formulated in such a manner that each item or person in the population has an equal chance of being included in the sample. T F 2. If nonprobability method… read more
rajeevanpillai
rajeevanpillai
Master\u0027s Degree
22 satisfied customers
1. For a sample size of 1, the sampling distribution of the
1. For a sample size of 1, the sampling distribution of the mean will be normally distributed A. Regardless of the shape of the population B. Only if the population values are larger than 30. C. Only … read more
Scott
Scott
MIT Graduate
Master's Degree
17,710 satisfied customers
1. A sample of 35 golfers showed that their average score on
1. A sample of 35 golfers showed that their average score on a particular golf course 80 with a standard deviation of 10. Answer each of the following (show all work): A) Find the 99% confidence inter… read more
abozer
abozer
Bachelor\u0027s Degree
6,158 satisfied customers
1. One factor in determining the size of a sample is the degree
1. One factor in determining the size of a sample is the degree of confidence selected. This is usually 0.95 or 0.99, but it may be any degree of confidence you specify. A. True B. False 2. The t dist… read more
Chirag
Chirag
Master\u0027s Degree
55 satisfied customers
The width of a confidence interval will be a. narrower for
The width of a confidence interval will be: a. narrower for 98% confidence than for 90% confidence b. wider for a sample size of 64 than for a sample size of 36 c. wider for a 99% confidence than for … read more
peppers18
peppers18
Bachelor's Degree
94 satisfied customers
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.

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.

Show MoreShow Less

Ask Your Question

x