The Boston public school district has had difficulty maintainingon-time bus service for its students ("A Year Later, SchoolBuses Still Late," Boston Globe, October 5, 2011). Supposethe district develops a new bus schedule to help combatchronic lateness on a particularly woeful route. Historically, thebus service on the route has been, on average, 12 minuteslate. After the schedule adjustment, the first 36 runs were anaverage of 8 minutes late. As a result, the Boston publicschool district claimed that the schedule adjustment was animprovement-students were not as late. Assume a populationstandard deviation for bus arrival time of 12 minutes.Develop the null and alternative hypotheses to determinewhether the schedule adjustment reduced the averagelateness time of 12 minutes.H, :µ<12 and H:µ212H, :µ=8 and Hu#8AH, :µ212 and H:µ<12H:X 28 and H:X <8

Answered: average of 8 minutes late. As a result,…

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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2) A job placement director claims that the average starting salary for nurse is $26000. A sample of 18 nurses has a mean salary of $25620 and a standard deviation of $680. Is there enough evidence to reject the directors claim at a = 5% LOS?
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