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ample of 20 vehicles has a mean speed of 49 miles per hour and a standard c support the county's claim? Complete parts (a) through (d) below. ) Write the claim mathematically and identify Ho and H. Choose the correct A. Ho: uS45 H: u > 45 O C. Ho H#45

ample of 20 vehicles has a mean speed of 49 miles per hour and a standard c support the county's claim? Complete parts (a) through (d) below. ) Write the claim mathematically and identify Ho and H. Choose the correct A. Ho: uS45 H: u > 45 O C. Ho H#45

MATLAB: An Introduction with Applications
MATLAB: An Introduction with Applications
6th Edition
ISBN:9781119256830
Author:Amos Gilat
Publisher:Amos Gilat
Chapter1: Starting With Matlab
Section: Chapter Questions
Problem 1P
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A county is considering rasing the speed limit on a road because they claim that the mean speed of vehicles is greater than 45 miles per hour. A random sample of 20 vehicles has a mean speed of 49 miles per hour and a standard deviation of 4.4 miles per hour. At a = 0.01, do you have enough evidence to support the county's claim? Complete parts (a) through (d) below. (a) Write the claim mathematically and identify H, and H. Choose the correct answer below. A. Ho: u545 B. Ho: u245 Ha: µ<45 H: u> 45 Oc. Ho: u#45 OD. H:p= 45 H: u# 45 Ha: H= 45 cor (b) Calculate the standardized test statistic. t = (Round to two decimal places as needed.)
Transcribed Image Text:A county is considering rasing the speed limit on a road because they claim that the mean speed of vehicles is greater than 45 miles per hour. A random sample of 20 vehicles has a mean speed of 49 miles per hour and a standard deviation of 4.4 miles per hour. At a = 0.01, do you have enough evidence to support the county's claim? Complete parts (a) through (d) below. (a) Write the claim mathematically and identify H, and H. Choose the correct answer below. A. Ho: u545 B. Ho: u245 Ha: µ<45 H: u> 45 Oc. Ho: u#45 OD. H:p= 45 H: u# 45 Ha: H= 45 cor (b) Calculate the standardized test statistic. t = (Round to two decimal places as needed.)
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