Calculus and Above

Calculus Questions? Ask a Mathematician for Answers ASAP

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

Test a research hypothesis that...

Test a research hypothesis that data (Sample) that was drawn from this same area (Population) is different in its lead contamination, and is therefore not representative. Use a Z-test at the 0.05 level of significance.

Population HWY Neighborhood Sample

Mean 111 ppm 310 ppm

or s 27 ppm 32 ppm

n N/A 35

Suppose you wanted your test to be directional, to show that the sample data has a smaller mean than the population data.

i. Restate the alternate hypothesis for a directional study.

ii. Find the critical value of your test statistic, and state the decision rule (i.e., delineate the regions of rejection and nonrejection of the null hypothesis).

iii. Compare the test statistic to the critical value, and report your conclusion.

Population HWY Neighborhood Sample

Mean 111 ppm 310 ppm

or s 27 ppm 32 ppm

n N/A 35

Suppose you wanted your test to be directional, to show that the sample data has a smaller mean than the population data.

i. Restate the alternate hypothesis for a directional study.

ii. Find the critical value of your test statistic, and state the decision rule (i.e., delineate the regions of rejection and nonrejection of the null hypothesis).

iii. Compare the test statistic to the critical value, and report your conclusion.

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

Our environment is very sensitive to the amount of ozone in

Our environment is very sensitive to the amount of ozone in the upper atmosphere. The level of ozone normally found is 7.9 parts/million (ppm). A researcher believes that the current ozone level is at… read more

The director of research and development is testing a new

The director of research and development is testing a new medicine. She wants to know if there is evidence at the 0.10 level that the medicine relieves pain in more than 350 seconds. After performing … read more

I need some help with my economic statistics homework! I am

Hi I need some help with my economic statistics homework! I am very confused.1. The mean income per person in the United States is $38,500, and the distribution of incomes follows a normal distributio… 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

1. Assume that a simple random sample has been selected from

1. Assume that a simple random sample has been selected from a normally distributed population and test the given claim. Identify the null and alternative hypotheses, test statistic, p-value, critical… read more

For problems 1 – 3 you are to use the p-value approach to test

For problems 1 – 3 you are to use the p-value approach to test the hypotheses where σ is known. 1.A university advises parents of incoming freshmen that the average cost of textbooks is typically grea… read more

Direct Mailing Company sells computer hardware and software

Direct Mailing Company sells computer hardware and software over the Internet. The company claims that at least 90% of all orders are mailed within 72 hours after they are received. A random sample of… 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

1. What is the primary reason for applying a finite population

1. What is the primary reason for applying a finite population correction coefficient? A. If you don't apply the correction coefficient, your confidence intervals will be too narrow, and thus overconf… read more

1. H0 is p = 0.45 and H1 is p ≠ 0.45. What type of test will

1. H0 is p = 0.45 and H1 is p ≠ 0.45. What type of test will be performed? A. One-tail testing of a mean B. Two-tail testing of a proportion C. One-tail testing of a proportion D. Two-tail testing of … read more

The following information is for the below Questions

The following information is for the below Questions The recommended daily allowance (RDA) of cobalamine (Vitamin B12) for growing teens is 2.4 µg (micrograms). It is generally believed that growing t… read more

I Calculated The Sample Mean For 12 Randomly Selected High

I calculated the sample mean for 12 randomly selected high school seniors' test scores. The mean was 908.3 and the sample standard deviation was 305.4. Can you construct a 99% confidence interval for … 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

1. Assume you need to build a confidence interval for a population

1. Assume you need to build a confidence interval for a population mean within some given situation. Naturally, you must determine whether you should use either the t-distribution or the z-distributio… read more

Assume that the data you have collected is testing a

Assume that the data you have collected is testing a hypothesis about a mean and n = 107. Find the critical value used to test a null hypothesis. α = 0.05 for a left-tailed test. Assume that the data … read more

1A Peanut farms typically hire local high school students

1A Peanut farms typically hire local high school students as well as migrant workers to "shake peanuts" during the fall harvest. The population proportion for all the states that grow peanuts is 40% h… read more

How would you use this in a two or more sample hypothesis testing Step

How would you use this in a two or more sample hypothesis testing Step 0ne-formulate testable hypothesis: The null hypothesis is that that the mean for males and females is the same. Ho: u1 = u2; Ha: … read more

2. Imagine a lead study that shows elevated soil contamination

2. Imagine a lead study that shows elevated soil contamination in neighborhoods near a highway (historical source of lead is gasoline additive). Test a research hypothesis that data (Sample) that was … 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

1,216 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.