Calculus and Above

Calculus Questions? Ask a Mathematician for Answers ASAP

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

species and measures their heights...

An ecologist randomly samples 15 plants of a specific species and measures their heights. He finds that this sample has a mean of 18 cm and a standard deviation of 2 cm. If we assume that the height measurements are normally distributed, find a 90% confidence interval for the mean height of all plants of this species. Then complete the table below.

Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.)What is the lower limit of the confidence interval?

What is the upper limit of the confidence interval?

Carry your intermediate computations to at least three decimal places. Round your answers to one decimal place. (If necessary, consult a list of formulas.)What is the lower limit of the confidence interval?

What is the upper limit of the confidence interval?

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

A light bulb manufacturer wants to compare the mean

A light bulb manufacturer wants to compare the mean lifetimes of two of its light bulbs, model A and model B. Independent random samples of the two models were taken. Analysis of 13 bulbs of model A s… read more

For a new study conducted by a fitness magazine, 295 females

For a new study conducted by a fitness magazine, 295 females were randomly selected. For each, the mean daily calorie consumption was calculated for a September-February period. A second sample of 210… read more

A random sample of 375 bolts from machine A contained 41

A random sample of 375 bolts from machine A contained 41 defective bolts, while an independently chosen, random sample of 325 bolts from machine B contained 32 defective bolts. Let p1 be the proportio… read more

Researchers interested in determining the relative

Researchers interested in determining the relative effectiveness of two different drug treatments on people with a chronic illness established two independent test groups. The first group consisted of… read more

Managers of an industrial plant want to determine which of

Managers of an industrial plant want to determine which of two types of fuel, gas or electric, is more cost-efficient (measured in cost per unit of energy). Independent random samples were taken of pl… read more

A researcher collected sample data for 12 women ages 18 to

A researcher collected sample data for 12 women ages 18 to 24. The sample had a mean serum cholesterol level (measured in mg/100 mL) of 191.7, with a standard deviation of 6.1. Assuming that serum cho… read more

A psychologist is interested in the mean IQ score of a given

A psychologist is interested in the mean IQ score of a given group of children. It is known that the IQ scores of the group have a standard deviation of 15. The psychologist randomly selects 50 childr… read more

Recorded here are the germination times (in days) for ten

Recorded here are the germination times (in days) for ten randomly chosen seeds of a new type of bean: 13, 12, 19, 11, 21, 19, 17, 15, 22, 15 Send data to Excel Assuming that germination times are nor… read more

The mean diastolic blood pressure for a random sample of 60

The mean diastolic blood pressure for a random sample of 60 people was 87 millimeters of mercury. If the standard deviation of individual blood pressure readings is known to be 8 millimeters of mercur… 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

Suppose that a random sample of 10 adult U.S. males has a

Suppose that a random sample of 10 adult U.S. males has a mean height of 70 inches with a standard deviation of 1.5 inches. If we assume that the heights of adult males in the U.S. are normally distri… read more

The following data were randomly drawn from an approximately

The following data were randomly drawn from an approximately normal population. 2, 3, 8, 11, 16 Send data to Excel Based on these data, find a confidence interval for the population standard deviation… read more

I'm going to try to figure out how to snip it... The

I'm going to try to figure out how to snip it... The standard deviation of the daily demand for a product is an important factor for inventory control for the product. Suppose that a pharmacy wants to… read more

The scores on an examination in biology are approximately

The scores on an examination in biology are approximately normally distributed with mean 500 and an unknown standard deviation. The following is a random sample of scores from this examination. 448, 4… read more

Pilots who cannot maintain regular sleep hours due to their

Pilots who cannot maintain regular sleep hours due to their work schedule often suffer from insomnia. A recent study on sleeping patterns of pilots focused on quantifying deviations from regular sleep… read more

Average, a new toy captures children's attention. He tests

average, a new toy captures children's attention. He tests 20 children selected at random and finds that their mean attention span is 34 minutes with a standard deviation of 6 minutes. If we assume th… read more

The scores on an examination in biology are approximately

The scores on an examination in biology are approximately normally distributed with mean 500 and an unknown standard deviation. The following is a random sample of scores from this examination. 448, 4… read more

The human resources department of a consulting firm gives a

The human resources department of a consulting firm gives a standard creativity test to a randomly selected group of new hires every year. This year, 90 new hires took the test and scored a mean of 11… 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

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

97 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.

Don

Master's Degree

29 satisfied customers

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

Kofi

PhD in Statistics

21,506 satisfied customers

Masters in Mathematics and Statistics

Sandhya_sharma

Master's Degree

5,547 satisfied customers

I hold M.Sc and M.Phil degrees in math and have several years of teaching experience.

< 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.