Unoccupied Seats on Flights Cause Airlines to Lose Revenue $\mu$ ,The Mean Number of Unoccupied Seats Per Flight During the Large

question 85

Multiple Choice

Unoccupied seats on flights cause airlines to lose revenue.Suppose a large airline wants to estimate its average number of unoccupied seats per flight over the past year.225 flight records are randomly selected and the number of unoccupied seats is noted with a sample mean of 11.6 seats and a standard deviation of 4.1 seats.A 90% confidence interval for $\mu$
,the mean number of unoccupied seats per flight during the past year would be _____.

• A)[4.86,18.34]
• B)[11.25,11.95]
• C)[11.57,11.63]
• D)[11.15,12.05]
• E)[11.30,12.20]

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Definitions:

Proton Spin Decoupled

A technique in NMR spectroscopy that eliminates interactions between proton spins to simplify signal interpretation.

Off-Resonance Decoupled

A technique in NMR spectroscopy used to simplify the spectrum by selectively removing couplings between nuclei.

Proton Spin Decoupled

A nuclear magnetic resonance (NMR) technique used to simplify spectra by removing proton-proton coupling interactions.

Down Field

In NMR spectroscopy, referring to shifts in resonance frequency towards lower magnetic field strengths, often indicating an electron-withdrawing environment.