A Hypothesis Test Is to Be Performed $8.4$ Minutes the Manager Has Installed a New Computer System and and Alternative

question 161

Multiple Choice

A hypothesis test is to be performed. State the null and alternative hypotheses.
-Last month the mean waiting time at a bank was $8.4$ minutes. The manager has installed a new computer system and claims that people will no longer have to wait as long.

• A) Null hypothesis: mean waiting time \(= 8.4\) minutes
• Alternative hypothesis: mean waiting time \(\leq 8.4\) minutes
• B) Null hypothesis: mean waiting time \(> 8.4\) minutes
• Alternative hypothesis: mean waiting time \(< 8.4\) minutes
• C) Null hypothesis: mean waiting time \(< 8.4\) minutes
• Alternative hypothesis: mean waiting time \(= 8.4\) minutes
• D) Null hypothesis: mean waiting time \(= 8.4\) minutes
• Alternative hypothesis: mean waiting time \(< 8.4\) minutes

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Definitions:

Molecular Formula

A concise way of expressing information about the atoms that constitute a particular chemical compound, using symbols for the elements and numerical subscripts to indicate the quantity of each atom.

NMR Spectrum

A depiction of the nuclear magnetic resonance of atoms within molecules, providing detailed information about the structure, dynamics, and environment of the molecule.

C-13 NMR

A type of nuclear magnetic resonance spectroscopy that focuses on the detection of carbon-13 isotopes to determine the structure of organic compounds.

Off Resonance Splitting

A phenomenon in NMR spectroscopy where the splitting of signal occurs away from the resonance frequency due to interactions with neighboring atoms.