Calculus and Above

Calculus Questions? Ask a Mathematician for Answers ASAP

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

Is the sample size important...

Is the sample size important if we know our sample came from a normal distribution in deciding if we should use a z statistic or a t statistic? Explain please.

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

Why did you say not to choose t distribution? Which

http://statulator.com/SampleSize/ss1M.htmlWhy did you say not to choose t distribution? Which distribution gives right values? Which one gives more correct value over another? Please explain in detail… read more

My question is assume that a population is normally

my question is assume that a population is normally distribute with a mean of 100 and a standard deviation of 15 would it be unusual for the mean of a sample of 3 to 115 or more why why not … read more

Thanks. This is the question that i need help with: Why

Hi, Thanks. This is the question that i need help with: Why can't we just master a single statistical test—such as the t-test—and use it in situations calling for mean equality decisions? … read more

A survey claims that 9 out of 10 doctors recommende aspirin

A survey claims that 9 out of 10 doctors recommende aspirin for thir patients with headaches. To test this claim against the alternative that the actual proportion of doctors who recommended aspirin i… read more

Recently, the bowling scores of a certain bowler were normally

Recently, the bowling scores of a certain bowler were normally distributed with mean 201 and standard deviation 23.The best score is 299. Find the percentile that corresponds to this score, and explai… read more

The following are the overall miles per gallon (MPG) of 2012

The following are the overall miles per gallon (MPG) of 2012 family sedans: 38 24 26 21 25 22 24 34 23 20 37 22 20 33 22 21 a. Construct a 95& confidence interval estimate for the population mean MPG … 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

Test a research hypothesis that data (Sample) that was drawn

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 leve… read more

Question 1: As a sample size approaches infinity, how does

Question 1: As a sample size approaches infinity, how does the student's t distribution compare to the normal z distribution? When a researcher draws a sample from a normal distribution, what can one … read more

I know the shape of the distribution of sample means is not

I know the shape of the distribution of sample means is not always that of an approximately normal distribution, but how do I explaine why?… read more

I need a very basic, and easy to understand explanation for

I need a very basic, and easy to understand explanation for this Statistics question: As a sample size approaches infinity, how does the t distribution compare to the normal z distribution? When you d… read more

CASE STUDY EXERCISE 2: Individual incomes. The Data Appendix

CASE STUDY EXERCISE 2: Individual incomes. The Data Appendix describes the file individuals, which contains the total incomes of 55,899 people between the ages of 25 and 65. We will illustrate samplin… read more

Hello my question is for Business statistics and it is If the

Hello my question is for Business statistics and it is If the population proportion is .4 with a sample size of 20, then is this sample large enough so that the sampling distribution of it is a normal… read more

Explain these concepts: 1. Degree of freedom 2. Critical

Explain these concepts: 1. Degree of freedom 2. Critical values for Z and t test 3. Z - test and t-test… read more

Selecting a distribution for inferences on the population mean Suppose

Selecting a distribution for inferences on the population mean Suppose that we want to estimate the mean reading speed of second graders. The random sample of students' reading speeds we choose has a … read more

For each of the following statements, state whether it is true

For each of the following statements, state whether it is true or false. If it is false, explain why. a) Sample evidence can be used to give proof that a null hypothesis is true. b) When testing a cla… 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

66 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.