Pre-Calculus

Have pre-calculus questions? Ask a pre-calculus tutor

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

For his PhD project, on...

For his PhD project, on a randomly selected day in May, Ali Cem samples 250 observations, from a population that is assumed to be normal, with a sample mean of 23 and a population standard deviation of 24.Determine the standard error of the mean. (Round your answer to 3 decimal places.)b. Determine the 95% confidence interval for the population mean. (In your calculations: round your z/t value to 2 decimals, but round all other values to 3 decimals. Round your final answer to 3 decimal places.)

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 Pre-Calculus Questions

Students collected the following data measuring the accuracy

Students collected the following data measuring the accuracy of wristwatches. The times (sec) below show the discrepancy between the real time and the time indicated on the wristwatch. Negative values… read more

We want to conduct a hypothesis test of the claim that for

We want to conduct a hypothesis test of the claim that for middle-aged adults the population mean of their cholesterol levels is less than 194.9. We choose a random sample of such levels. The sample h… read more

We want to conduct a hypothesis test of the claim that the

We want to conduct a hypothesis test of the claim that the population mean time it takes drivers to react following the application of brakes by the driver in front of them is more than 1.7 seconds. S… read more

We want to conduct a hypothesis test of the claim that the

Second opinion] We want to conduct a hypothesis test of the claim that the population mean reading speed of second graders is different from 29.6 words per minute. So, we choose a random sample of stu… read more

Not all visitors to a certain company's website are

Not all visitors to a certain company's website are customers or potential customers. In fact, the company's executives estimate that about 10% of all visitors to the website are looking for other web… read more

We want to conduct a hypothesis test of the claim that the

We want to conduct a hypothesis test of the claim that the population mean reading speed of second graders is different from 28.6 words per minute. So, we choose a random sample of students' reading s… read more

A normal distributed population has parameters μ = 243.2 and

A normal distributed population has parameters μ = 243.2 and σ = 7.8 . If a random sample of size n = 126 is selected,What is the mean of the distribution of sample means? μ ¯ x =What is the standard … read more

Suppose x has a distribution with a mean of 80 and a

Suppose x has a distribution with a mean of 80 and a standard deviation of 9. Random samples of size n = 36 are drawn. (a) Describe the x bar distribution. x bar has a normal distribution. x bar has a… read more

For his PhD project, on a randomly selected day in May, Ali

For his PhD project, on a randomly selected day in May, Ali Cem samples 250 observations, from a population that is assumed to be normal, with a sample mean of 23 and a population standard deviation o… read more

In order to approximate the number of text messages sent

In order to approximate the number of text messages sent daily by Swedish teenagers, Neu Star Communications took a random sample of Swedish youth, finding the number of text messages they sent on a g… read more

A survey of 30 adults found that the mean age of a persons

A survey of 30 adults found that the mean age of a persons primary vehicle is 5.6 years. Assuming normal distribution and the standard deviation of the population is 0.8 years find the 99% confidence … read more

Question 1 Assume that the weight loss first month

Question 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 dis… read more

I see where you have already answered a homework assignment

I see where you have already answered a homework assignment the same as this. Please let me know what the charge will be to get the answers. Questions 1 to 20: Select the best answer to each question.… read more

18. Assume that a sample is used to estimate a population mean

18. Assume that a sample is used to estimate a population mean mu. Use the given confidence level and sample data to find the margin of error. Assume that the sample is a simple random sample and the … read more

"For John Only " Hi John.. I noticed you have answered

"For John Only " Hi John.. I noticed you have answered similiar questions to the ones I would like for you to help me with. Hopefully you will be able to. 1. The commissioner of the state police is re… read more

What is the mean annual snowfall during 49 randomly picked years?

Solve the problem. The amount of snowfall falling in a certain mountain range is normally distributed with a mean of 94 inches, and a standard deviation of 14 inches. What is the probability that the … read more

A confidence interval estimate for the population mean is given

A confidence interval estimate for the population mean is given to be (39.50, 47.85). If the standard deviation is 13.639 and the sample size is 41, answer each of the following (show all work): (A) D… read more

1. By measuring the amount of time it takes a component of

1. By measuring the amount of time it takes a component of a product to move from one workstation to the next, an engineer has estimated that the standard deviation is 3.86 seconds. Answer each of the… 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

168 satisfied customers

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

JACUSTOMER-yrynbdjl-

Master's Degree

13 satisfied customers

I have taught college Mathematics for the past 10 years.

Dr. Arthur Rubin

Doctoral Degree

12 satisfied customers

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

Ashleigh T

Educator

5,756 satisfied customers

Highly-Qualified Educator

Kofi

PhD in Statistics

3,308 satisfied customers

Masters in Mathematics and Statistics

Scott

MIT Graduate

1,874 satisfied customers

Over 13,000 accepts & 100% feedback in the old math category

Sandhya_sharma

Master's Degree

1,494 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.