6.38 Cost of unleaded fuel. According to the American Automobile Association (AAA), the average cost of a gallon ofregular unleaded fuel at gas stations in May 2014 was $3.65 (AAA Fuel Gauge Report). Assume that the standarddeviation of such costs is $.15. Suppose that a random sample of n - 100 gas stations is selected from thepopulation and the cost per gallon of regular unleaded fuel is determined for each. Consider z, the sample meancost per gallon.a. Calculate and đj.b. What is the approximate probability that the sample has a mean fuel cost between $3.65 and $3.67?c. What is the approximate probability that the sample has a mean fuel cost that exceeds $3.67?d. How would the sampling distribution of z change if the sample size n were doubled from 100 to 200? How doyour answers to parts b and c change when the sample size is doubled?

how would the sampling distribution of x bar change if the sample size n were doubled from 100 to…

Answered: d. How would the sampling distribution…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

See similar textbooks

Similar questions

In a survey of 500 drivers from the South, 408 wear a seat belt. In a survey of 370 drivers from the Northeast, 288 wear a seat belt. At a = 0.07, can you support the claim that the proportion of drivers who wear seat belts is greater in the South than in the Northeast? Assume the random samples are independent. Complete parts (a) through (e). (a) Identify the claim and state Ho and Ha The claim is "the proportion of drivers who wear seat belts in the South is greater than in the Northeast." Let p, represent the population proportion for the South, and p2 represent the population proportion for the Northeast. State Hg and H Choose the correct answer below. O B. Ho: P1 = P2 OC. Ho: P, * P2 O A. Ho: P1 > P2 H: P, SP2 H: P, *P2 Ha: P1 = P2 O D. Ho: P1 P2 OF. Ho: P1 2 P2 H,: P, OC. z
15.
I need answer for letter d. The last part. Thank you!
The question is in the attachment
question 11
1. Suppose the proportion of American adults who work at home is 40%. For a random sample of 100 American adults, what is the distribution of the sample proportion?
In a recent Gallup survey of 1,012 randomly selected U.S. adults (age 18 and over), 53% said that they were dissatisfied with the quality of education students receive in kindergarten through grade 12. They also report that the "margin of sampling error is plus or minus 4%" What is the sample being used? R F O U.S. adults (age 18 and over) O 1012 randomly selected U.S. adults OU.S. adults satisfied with K-12 education O U.S. adults dissatisfied with K-12 education C e Textbook and Media Save for Later O % 18 G 7 T Y U O 8 9 TH J K L Attempts: 0 of 1 used 0 Submit Answer 55°F Backsp
QUESTION 8 Find the mode(s) for the given sample data. 20, 38, 46, 38, 49, 38, 49 49 38 39.7 46
Please solve asap
Question 2 Suppose that the answer to the previous Question were such that the Relative Frequency of Class D is 0.25. Further suppose that the total sample size were 40; what is the (regular) frequency of class D? Answer
2.
Samuel F.B. Morse (1791-1872), the creator of the Morse Code, claimed that 12 % of all letters used in English language were "e"s. Suppose random samples of 196 letters are selected from a book. Use this information to answer question below.

Recommended textbooks for you

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

MATLAB: An Introduction with Applications

Statistics

ISBN:

9781119256830

Author:

Amos Gilat

Publisher:

John Wiley & Sons Inc

Probability and Statistics for Engineering and th…

Statistics

ISBN:

9781305251809

Author:

Jay L. Devore

Publisher:

Cengage Learning

Statistics for The Behavioral Sciences (MindTap C…

Statistics

ISBN:

9781305504912

Author:

Frederick J Gravetter, Larry B. Wallnau

Publisher:

Cengage Learning

Elementary Statistics: Picturing the World (7th E…

Statistics

ISBN:

9780134683416

Author:

Ron Larson, Betsy Farber

Publisher:

PEARSON

The Basic Practice of Statistics

Statistics

ISBN:

9781319042578

Author:

David S. Moore, William I. Notz, Michael A. Fligner

Publisher:

W. H. Freeman

Introduction to the Practice of Statistics

Statistics

ISBN:

9781319013387

Author:

David S. Moore, George P. McCabe, Bruce A. Craig

Publisher:

W. H. Freeman

SEE MORE TEXTBOOKS

d. How would the sampling distribution of i change if the sample size n were doubled from 100 to 200? How do your answers to parts b and c change when the sample size is doubled?