Log out Go to App
Go to App

Learning Materials

Features

Discover

Chapter 8: Q 8.11RP. (page 347)

The following figure shows the standard normal curve and two \(t\)-curves. Which of the two \(t\)-curves has the larger degrees of freedom? Explain your answer.

Short Answer

Expert verified

The t-curve which is closer to the standard normal curve has the larger degree of freedom.

Step by step solution

01

Given information

02

Explanation

The shape of the t-curve approaches the shape of a conventional normal curve as the number of degrees of freedom grows. As a result, the t-curve with the most degrees of freedom is closer to the conventional normal curve.

Unlock Step-by-Step Solutions & Ace Your Exams!

  • Full Textbook Solutions

    Get detailed explanations and key concepts

  • Unlimited Al creation

    Al flashcards, explanations, exams and more...

  • Ads-free access

    To over 500 millions flashcards

  • Money-back guarantee

    We refund you if you fail your exam.

Start your free trial

Over 30 million students worldwide already upgrade their learning with Vaia!

One App. One Place for Learning.

All the tools & learning materials you need for study success - in one app.

Get started for free

Most popular questions from this chapter

Find the confidence level and αfor

a. 85%confidence interval.

b. 95%confidence interval

Keep on Rolling. The Rolling Stones, a rock group formed in the 1960s, have toured extensively in support of new albums, Pollstar has collected data on the earnings from the Stones's North American tours. For thirty randomly selected Rolling Stones concerts, the mean gross earnings is \(2.27 million. Assuming a population standard deviation gross earnings of \)0.5 million, obtain a 99% confidence interval for the mean gross earnings of all Rolling Stones concerts. Interpret your answer in words.

When estimating an unknown parameter, what does the margin of error indicate?

Positively Selected Genes. R. Nielsen et al. compared 13.731 annotated genes from humans with their chimpanzee orthologs to identify genes that show evidence of positive selection. The researchers published their findings in "A Scan for Positively Selected Genes in the Genomes of Humans and Chimpanzees" (PLOS Biology, Vol. 3, Issue 6. Pp. 976-985). A simple random sample of 14 tissue types yielded the following number of genes.

Explain the effect on the margin of error and hence the effect on the accuracy of estimating a population mean by a sample mean.

Decreasing the sample size while keeping the same confidence level.
See all solutions

Recommended explanations on Math Textbooks

Pure Maths

Read Explanation

Applied Mathematics

Read Explanation

Theoretical and Mathematical Physics

Read Explanation

Probability and Statistics

Read Explanation

Discrete Mathematics

Read Explanation

Mechanics Maths

Read Explanation
View all explanations

What do you think about this solution?

We value your feedback to improve our textbook solutions.

Study anywhere. Anytime. Across all devices.

Sign-up for free