Calculus and Above

Calculus Questions? Ask a Mathematician for Answers ASAP

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

A sanitation department is interested...

A sanitation department is interested in estimating the mean amount of garbage per bin for all bins in the city. In a random sample of 40 bins, the sample mean amount was 47 pounds and the sample standard deviation was 5.6 pounds. Construct 95% and 99% confidence intervals for the mean amount of garbage per bin for all bins in the city.

1)What is the lower limit of the 95% interval? Give your answer to three decimal places.

2)What is the upper limit of the 95% interval? Give your answer to three decimal places.

3)What is the lower limit of the 99% interval? Give your answer to three decimal places.

4)What is the upper limit of the 99% interval? Give your answer to three decimal places.

A web based software company is interested in estimating the proportion of individuals who use the Firefox browser. In a sample of 200 of individuals, 20 users stated that they used Firefox. Using this data, construct a 99% confidence interval for the proportion of all individuals that use Firefox.

1)What is the lower limit on the 99% confidence interval? Give your answer to three decimal places

2)What is the upper limit on the 99% confidence interval? Give your answer to three decimal places.

3)What sample size would be required so that the width of the 99% confidence interval would be at most 0.02 units wide? Be as conservative as possible with your answer!

1)What is the lower limit of the 95% interval? Give your answer to three decimal places.

2)What is the upper limit of the 95% interval? Give your answer to three decimal places.

3)What is the lower limit of the 99% interval? Give your answer to three decimal places.

4)What is the upper limit of the 99% interval? Give your answer to three decimal places.

A web based software company is interested in estimating the proportion of individuals who use the Firefox browser. In a sample of 200 of individuals, 20 users stated that they used Firefox. Using this data, construct a 99% confidence interval for the proportion of all individuals that use Firefox.

1)What is the lower limit on the 99% confidence interval? Give your answer to three decimal places

2)What is the upper limit on the 99% confidence interval? Give your answer to three decimal places.

3)What sample size would be required so that the width of the 99% confidence interval would be at most 0.02 units wide? Be as conservative as possible with your answer!

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

In a sample of 325 college seniors, 263 responded positively

In a sample of 325 college seniors, 263 responded positively when asked if they had spring fever. Based upon this, compute a 95% confidence interval for the proportion of all college seniors who have … read more

A researcher wishes to estimate the proportion of x-ray

A researcher wishes to estimate the proportion of x-ray machines that malfunction. A random sample of 250 machines is taken, and 57 of the machines in the sample malfunction. Based upon this, compute … read more

A researcher wishes to estimate the proportion of x-ray

A researcher wishes to estimate the proportion of x-ray machines that malfunction. A random sample of 225 machines is taken, and 67 of the machines in the sample malfunction. Based upon this, compute … read more

Use the sample data and confidence level given below to

Use the sample data and confidence level given below to complete parts (a) through (d). A research institute poll asked respondents if they felt vulnerable to identity theft. In the poll, n equals … read more

The university data center has two main computers. The

The university data center has two main computers. The center wants to examine whether computer 1 is receiving tasks that require processing times comparable to those of computer 2 . A random sample o… read more

For this problem, carry at least four digits after the

For this problem, carry at least four digits after the decimal in your calculations. Answers may vary slightly due to rounding.A random sample of 5616 physicians in Colorado showed that 3116 provided … read more

Salmon Weights: Assume that the weights of spawning Chinook

Salmon Weights: Assume that the weights of spawning Chinook salmon in the Columbia river are normally distributed. You randomly catch and weigh 18 such salmon. The mean weight from your sample is 22.2… read more

Corn: In a prior sample of corn, farmer finds that 12% of

Corn: In a prior sample of corn, farmer Carl finds that 12% of the sample has worms but the margin of error for his population estimate was too large. He wants an estimate that is in error by no more … read more

Pinworm: In a random sample of 830 adults in the U.S.A., it

Pinworm: In a random sample of 830 adults in the U.S.A., it was found that 80 of those had a pinworm infestation. You want to find the 95% confidence interval for the proportion of all U.S. adults wit… read more

You are given the sample mean and the population standard

You are given the sample mean and the population standard deviation. Use this information to construct the 90% and 95% confidence intervals for the population mean. Interpret the results and compare… read more

Method 1: Use the Student's t distribution with d.f. = n −

Method 1: Use the Student's t distribution with d.f. = n − 1.Method 2: When n ≥ 30, use the sample standard deviation s as an estimate for σ, and then use the standard normal distribution.Consider a r… read more

Could you also answer this question for me? Thank you again

Could you also answer this question for me? Thank you again for your help earlier! -----------------------------------------------------------------------------------------------Method 1: Use the Stud… read more

Estion A sociologist is studying the prevalence of crime in

estionA sociologist is studying the prevalence of crime in one major city. In a sample of 200randomly selected residents, 62say that they have been victimized by a criminal. Based on this sample, cons… read more

Uestion Twenty years ago, a very famous psychologist

uestionTwenty years ago, a very famous psychologist specializing in marriage counseling authored a book detailing the way in which she believed spouses should communicate. She is now interested in the… read more

The lifetime of a certain brand of battery is known to have

The lifetime of a certain brand of battery is known to have a standard deviation of 23hours. Suppose that a random sample of 50such batteries has a mean lifetime of 43.9hours. Based on this sample, fi… read more

Find the critical value that should be used in constructing

Find the critical value that should be used in constructing the confidence interval for same data set. Round your answer to three decimal places.… read more

A research company desires to know the mean consumption of

A research company desires to know the mean consumption of milk per week among males over age 45. A sample of 1842 males over age 45 was drawn and the mean milk consumption was 4.9 liters. Assume that… read more

The FBI wants to determine the effectiveness of their 10

The FBI wants to determine the effectiveness of their 10 Most Wanted list. To do so, they need to find out the fraction of people who appear on the list that are actually caught.Step 1 of 2 : Suppose … 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 >

rajeevanpillai

Master's Degree

1,335 satisfied customers

B.Sc Mathematics and M.Sc, M Phil Statistics

Mr. Gregory White

Master's Degree

114 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

96 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

< 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.