**Transcription for Educational Website:**An SRS of 350 high school seniors gained an average of $ \overline{x} = 45 $ points in their second attempt at the SAT Mathematics exam. Assume that the change in score has a Normal distribution with standard deviation $ \sigma = 26 $.---**Question:**What is the margin of error for a confidence level of 90%? Give your answer to three decimal places.Margin of error: [ ]---**Follow-up Question:**How does decreasing the confidence level change the margin of error of a confidence interval when the sample size and population standard deviation remain the same?- ○ Decreasing the confidence level increases the margin of error, provided the sample size and population standard deviation remain the same.- ○ Decreasing the confidence level decreases the margin of error, provided the sample size and population standard deviation remain the same.- ○ Decreasing the confidence level decreases the margin of error, provided the sample size and population standard deviation also decrease.- ○ Decreasing the confidence level keeps the margin of error the same, provided the sample size and population standard deviation remain the same.© Macmillan Learning

The random variable is score.We have to find the margin of error.This is One mean z-interval.

Answered: Macmillan Learning An SRS of 350 high…

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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Example: In 16 one-hour test runs, the gasoline consumption of an engine averaged 16.4 gallones with a standart deviation of 2.1 gallons. Test the claim that the average gasoline consumption is 12.0 gallons per hours.

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