Which of the Following Statements Is True?
A)Technically, 90 Per $\sigma$

question 19

Multiple Choice

Which of the following statements is true?

• A)Technically, 90 per cent of the area under a normal distribution lies between +/- 1.65 \(\sigma\) from the mean.
• B)Technically, 90 per cent of the area under a normal distribution lies between +/- 2.33 \(\sigma\) from the mean.
• C)Technically, 99 per cent of the area under a normal distribution lies between +/- 1.65 \(\sigma\) from the mean.
• D)Technically, 99 per cent of the area under a normal distribution lies between +/- 2.33 \(\sigma\) from the mean.

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Definitions:

Aromatic

Refers to a class of compounds that contain one or more planar ring structures with delocalized π-electron systems, leading to stable and often fragrant molecules.

Antiaromatic

A compound that is cyclic, conjugated, but does not follow Huckel's rule, often being less stable due to its electron configuration.

Nonaromatic

Organic compounds that do not fulfill the criteria for aromaticity, lacking the special stability observed in aromatic systems.

Fused-ring Heterocycle

A cyclic compound where two or more rings share two or more common atoms, with at least one of the rings containing atoms other than carbon.