Calculus and Above

Calculus Questions? Ask a Mathematician for Answers ASAP

Connect one-on-one with {0} who will answer your question

Customer Question

In a random sample...

In a random sample of 500 people aged 20-24, 22% were smokers. In a random sample of 450 people aged 25-29, 14% were smokers.

**Tutor's Assistant:** The Math Tutor can help you get an A on your homework or ace your next test. Tell me more about what you need help with so we can help you best.

Construct a 95% confidence interval for the difference between the two population proportions.

**Tutor's Assistant:** Is there anything else the Math Tutor should be aware of?

Test the claim that the proportion of smokers in the two age group is the same. Use a significance level of 0.05

Show More

Show Less

Was this answer helpful?

Describe your issueThe assistant will guide you

Chat 1:1 with a tutorLicensed Experts are available 24/7

100% satisfaction guaranteeGet all the answers you need

Related Calculus and Above Questions

8.27 If n = 400 and X = 25, construct a 99% confidence interval

8.27 If n = 400 and X = 25, construct a 99% confidence interval estimation for the population proportion. 8.37 If you want to be 95% confident of estimating the population proportion to within a sampl… read more

1. (Chapter 7: Estimating a Population Proportion) A poll

Attachment: 2014-06-28_022745_work.docx 1. (Chapter 7: Estimating a Population Proportion) A poll sample of 500 people was conducted if they support new initiative. 200 people said yes. Find the margi… read more

Use the given information to find the P-value. Also, use a

Use the given information to find the P-value. Also, use a 0.05 significance level and state the conclusion about the null hypothesis (reject the null hypothesis or fail to reject the null hypothesis)… read more

I need some statistic questions answered in the next hour and

I need some statistic questions answered in the next hour and 50 minutes. 1.Assume that you plan to use a significance level of α = 0.05 to test the claim that p1 = p2. Use the given sample sizes and … read more

1. Assume that the data has a normal distribution and the

1. Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis. ALPHA = 0.05 for a left-tailed test. -… read more

Question 10 - A random sample of size n= 20 was drawn from

Question 10 - A random sample of size n= 20 was drawn from a population of size N= 200. The measurements shown in the table below were obtained. 38 24 49 24 29 22 52 25 40 51 26 40 26 38 51 40 48 41 4… read more

Can you help with my Elementary Statistics Quiz? If so, you

Can you help with my Elementary Statistics Quiz? If so, you will have two hours to complete the quiz which consists of 25 questions. Topics that will be covered are: Linear Correlations Fundamentals o… read more

I need help with homework questions. They are multiple choice

I need help with homework questions. They are multiple choice questions in intro to statistics and they have to be done today. They do not have to be perfect as you can redo the homework as many times… read more

Please help with these 17 questions!! 1. Find the margin of

Please help with these 17 questions!! 1. Find the margin of error for the given values of c,s,and n. c=0.90,s=2.9,n=100 2. Construct the confidence interval for the population mean u. c=0.98,x=8.4,s=0… read more

Find the critical z value used to test a null hypothesis?

1. Assume that the data has a normal distribution and the number of observations is greater than fifty. Find the critical z value used to test a null hypothesis. Alpha = 0.09 for a right-tailed test. … read more

2)Which of the following hypothesis tests use a z test statistic? A)

2)Which of the following hypothesis tests use a z test statistic? A) Matched Pairs B) Single Proportion C) Two Proportions D) Goodness-of-Fit E) Single Mean: σ Known F) Independence G) Two Variances H… read more

Question 1 For a cluster sample, the estimates of the halves

Question 1 For a cluster sample, the estimates of the halves came in at 58.75 and 58.35. Find the Standard Error. Answer a. 0.30 b. 110.6 c. 0.15 d. 0.20 e. 110.9 Question 3 A utility company serves 5… read more

Hi Sandhya! Its me again, do you think you could help me

Hi Sandhya! It's me again, do you think you could help me with this homework? Deadline is 7 hours from now. Really need help! QUESTION 1 Before launching a new online service, a bank is interested in … read more

Sample of 45 home theatre systems has a mean price of $129.00

3. You are given the sample mean and the sample standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Which interval is wider? If the conv… read more

Find the margin of error for the given values of c, s, and

Find the margin of error for the given values of c, s, and n. C=0.90, s=3.9, n=49 E=_________ (Round to three decimal places as needed) Construct the confidence interval for the population mean µ. C= … read more

1. Lets assume that the age factor for the class was collected

1. Let's assume that the age factor for the class was collected from randomly selected students taking Elements of Statistics from college—even though we know the data was not truly randomly collected… read more

1.Assume that the weight loss for the first month of a diet

1.Assume that the weight loss for the first month of a diet program varies between 6 pounds and 12 pounds, and is spread evenly over the range of possibilities, so that there is a uniform distribution… read more

1. Huamn beta-endorphin (HBE) is a hormone secreted by the

1. Huamn beta-endorphin (HBE) is a hormone secreted by the pituitary gland under conditions of stress. A researcher conducted a study to investigate whether a program of regular exercise might affect … read more

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.

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.

...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.

Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help.

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!!!!

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.

Hesperia, CA

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

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.

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.

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.

Dallas, TX

< Previous | Next >

Mr. Gregory White

Master's Degree

111 satisfied customers

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

SusanAthena

Master's Degree

102 satisfied customers

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

Dr Arthur Rubin

Doctoral Degree

62 satisfied customers

Ph.D. in Mathematics, 1978, from the California Institute of Technology, over 20 published papers

JACUSTOMER-yrynbdjl-

Master's Degree

42 satisfied customers

I have a MS in Mathematics and I have taught Mathematics for 10 years at the college level.

dhouse1940

Master's Degree

33 satisfied customers

BS mathematics, MS biostatistics, 35+ yrs designing & analyzing biological experiments.

Don

Master's Degree

29 satisfied customers

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

mhasan420

Master's Degree

15 satisfied customers

BA Maths, Oxford

< Previous | Next >

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.