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.At the 5% significance level, does the evidence support theBoston public school district's claim?No, since the p-value is less than alphaO No, since the value of the test statistic is greater than thecritical valueYes, since the p-value is less than alphaYes, since the value of the test statistic is greater thanthe critical value

Given that Hypothesized Population Mean (\mu)(μ) = 1212 Population Standard Deviation…

Answered: The Boston public school district has…

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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How common are financial cost or contractual constraints associated with smartphone ownership? A survey of smartphone users found that 48% of the 18- to 29-year-olds, 39% of the 30- to 49-year-olds, 24% of the 50- to 64-year-olds, and 19% of those age 65 or older have reached the maximum amount of data they are allowed to use as part of their plan, at least on occasion: Suppose the survey was based on 300 smartphone owners in each of the four age groups: 18 to 29, 30 to 49, 50 to 64, and 65 and older. Complete parts (a) through (c). a. At the 0.05 level of significance, is there evidence of a difference among the age groups in the proportion of smartphone owners who have reached the maximum amount of data they are allowed to use as part of their plan, at least on occasion? Find the test statistic x 2 stat? and critcal value
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There are several risks and costs associated with the airline's decision to overbook flights. If too many passengers show up, the airline may need to offer incentives for customers to give up their seats, which can be costly. If too few passengers show up, the airline may be forced to fly with empty seats, resulting in lost revenue. Furthermore, overbooking can lead to negative publicity and damage to the airline's reputation if too many customers are bumped from their flights. In terms of strategy, the airline must weigh the potential benefits of overbooking (maximizing revenue by filling as many seats as possible) against the potential risks and costs. The airline may also consider adjusting its overbooking policy based on factors such as the route, time of day, and historical data on no-show rates for specific flights. Overall, effective demand forecasting and capacity planning are crucial for the airline to optimize its operations and profitability while minimizing negative…
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How common are financial cost or contractual constraints associated with smartphone ownership? A survey of smartphone users found that 49% of the 18- to 29-year-olds, 40% of the 30- to 49-year-olds, 25% of the 50- to 64-year-olds, and 19% of those age 65 or older have reached the maximum amount of data they are allowed to use as part of their plan, at least on occasion: Suppose the survey was based on 200 smartphone owners in each of the four age groups: 18 to 29, 30 to 49, 50 to 64, and 65 and older The test statistic is χ2STAT = ? (Round to three decimial places)
Please explain

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Hypothesized Population Mean $(\mu)$ =	$12$
Population Standard Deviation $(\sigma)$ =	$12$
Sample Size $(n)$ =	$36$
Sample Mean $(\bar X)$ =	$8$
Significance Level $(\alpha)$	$0.05$